CN108260136B - Pilot frequency measurement control method and device - Google Patents
Pilot frequency measurement control method and device Download PDFInfo
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Abstract
本申请涉及网络技术领域，尤其涉及一种异频测量控制方法及装置，用以解决现有技术中存在的无法保证异频切换的及时性或导致UE上下行业务速率损失过多的问题；该方法包括：网络侧设备与UE建立RRC连接；基于RRC连接，向UE下发第一测量配置信息和第二测量配置信息；第一测量配置信息中包含UE在向服务小区中心方向移动时针对共站异频邻区启动异频测量所满足的第一测量事件，第一测量事件是指UE的服务小区信号强度高于第一门限值；第二测量配置信息中包含UE在向服务小区边缘方向移动时针对异站异频邻区启动异频测量所满足的第二测量事件；第二测量事件是指UE的服务小区信号强度低于第二门限值，第一门限值大于第二门限值。
The present application relates to the field of network technologies, and in particular, to an inter-frequency measurement control method and device, which are used to solve the problems in the prior art that the timeliness of inter-frequency handover cannot be guaranteed or cause excessive loss of UE uplink and downlink service rates; The method includes: a network side device establishes an RRC connection with the UE; based on the RRC connection, delivering first measurement configuration information and second measurement configuration information to the UE; The first measurement event that is satisfied when the inter-frequency neighbor cell of the station starts inter-frequency measurement, the first measurement event means that the signal strength of the serving cell of the UE is higher than the first threshold value; the second measurement configuration information includes the UE is on the edge of the serving cell. The second measurement event that is satisfied by starting the inter-frequency measurement for the inter-station and inter-frequency neighboring cells when the direction moves; the second measurement event means that the signal strength of the serving cell of the UE is lower than the second threshold value, and the first threshold value is greater than the second threshold value. Threshold value.
Description
Technical Field
The present invention relates to the field of network technologies, and in particular, to a pilot frequency measurement control method and apparatus.
Background
With the gradual expansion of Long Term Evolution (LTE) network scale, LTE networks in the form of inter-frequency networking are becoming more and more popular.
Currently, in an LTE network in the form of a pilot frequency networking, if a User Equipment (UE) is switched from a current serving cell to an adjacent cell with different frequency points during a moving process, a pilot frequency switching control strategy is required to implement the pilot frequency switching process. In the existing inter-frequency handover control strategy, an a2 event (in the LTE standard protocol, the a2 event is defined as the serving cell signal strength being lower than an absolute threshold) is generally adopted to control the initiation of inter-frequency measurement, and an a4 event (in the LTE standard protocol, the a4 event is defined as the neighbor cell quality being higher than an absolute threshold) is adopted as a handover decision execution event. As shown in fig. 1, a flowchart of a method for implementing inter-frequency handover by using an a2 event and an a4 event in the prior art includes the following steps:
step 1: the UE establishes Radio Resource Control (RRC) connection with a base station (Evolved Node-B, eNodeB).
Step 2: the eNodeB issues a measurement control indication of the a2 event to the UE.
And step 3: after receiving the measurement control instruction of the A2 event, the UE measures the signal strength of the current serving cell, and reports an A2 event measurement report to the eNodeB when the measured signal strength of the current serving cell is lower than a preset absolute threshold.
And 4, step 4: after receiving the a2 event measurement report reported by the UE, the eNodeB continues to issue an a4 event measurement control instruction to the UE.
And 5: after receiving the A4 event measurement control instruction, the UE measures the signal strength of the adjacent pilot frequency cell, and reports an A4 event measurement report to the eNodeB after measuring that the signal strength of the adjacent pilot frequency cell is higher than a preset absolute threshold.
Step 6: the eNodeB makes a handover decision and triggers the subsequent handover procedure after receiving the a4 event measurement report.
The above-described method of initiating inter-frequency measurement based on the a2 event is applicable to a scenario in which the UE moves to a cell edge and is handed over from the current serving cell to a neighboring adjacent inter-frequency cell. However, for a co-sited inter-frequency cell (i.e. a cell with multiple frequency bands deployed on the same site), since an operator may configure different frequency bearer strategies in the center and the peripheral area of the cell, when the UE moves to the center of the cell and needs to switch to an inter-frequency neighboring cell of the cell center bearer service, the following problems may occur:
the first problem is that: after the UE receives the measurement control indication of the a2 event, because the signal strength of the cell center is good, the measured signal strength may not reach the pilot frequency measurement starting condition of the a2 event, and the UE may not report an a2 event measurement report to the eNodeB and may not start a subsequent pilot frequency measurement procedure. Therefore, the UE cannot be switched to the pilot frequency adjacent cell of the cell center bearing service in time;
if the absolute threshold of the a2 event is set to a higher threshold value in order to overcome the above problem, there is a second problem, namely:
the second problem is that: because all terminals in the co-sited inter-frequency cell receive the a2 event measurement control instruction issued by the eNodeB, if an excessively high threshold is set for the a2 event, the signal strength measured by the UE that is at the cell edge and does not need to switch to the cell center inter-frequency neighboring cell will easily reach the start inter-frequency measurement condition of the a2 event, further report the a2 event measurement report to the eNodeB, and start inter-frequency measurement after receiving the a4 event measurement control instruction issued by the eNodeB. When the pilot frequency measurement is started, the eNodeB configures a pilot frequency measurement GAP, that is, a measurement GAP (where the measurement GAP is a time from the time when the UE leaves a cell of a current frequency point to the time when the UE performs signal measurement in cells of other frequency points) for the UE through the RRC reconfiguration signaling.
Therefore, when the UE moves to the pilot frequency neighboring cell of the cell center to perform pilot frequency handover, in order to ensure that the UE can be handed over to the pilot frequency neighboring cell of the cell center in time, a higher threshold value should be set for the a2 event as much as possible; however, a higher threshold value is set for the event a2, and for a scenario in which the UE moves to a neighboring inter-frequency neighboring cell for inter-frequency handover, the UE enters the inter-frequency measurement state too early, which results in excessive decrease of the uplink and downlink service rates of the UE.
Based on this, in the prior art, for different pilot frequency switching scenarios, the pilot frequency switching is performed by using the existing pilot frequency switching control strategy, which has the problem that the timeliness of the pilot frequency switching cannot be ensured or the uplink and downlink service rate loss of the UE is too much.
Disclosure of Invention
The embodiment of the application provides a pilot frequency measurement control method and a pilot frequency measurement control device, which are used for solving the problem that the timeliness of pilot frequency switching cannot be guaranteed or the uplink and downlink service rate loss of UE is excessive in the prior art.
The pilot frequency measurement control method provided by the embodiment of the application comprises the following steps:
a network side device establishes Radio Resource Control (RRC) connection with a User Equipment (UE);
based on the RRC connection, issuing first measurement configuration information and second measurement configuration information to the UE;
the first measurement configuration information includes a first measurement event that is satisfied by starting inter-frequency measurement for a co-sited inter-frequency neighboring cell when the UE moves to a serving cell center direction, where the first measurement event means that the serving cell signal strength of the UE is higher than a first threshold value;
the second measurement configuration information includes a second measurement event which is satisfied by starting pilot frequency measurement for a pilot frequency neighboring cell of a different station when the UE moves towards the edge direction of a service cell; the second measurement event means that the signal strength of the serving cell of the UE is lower than a second threshold, and the first threshold is greater than the second threshold.
Another embodiment of the present application provides a pilot frequency measurement control method, including:
user Equipment (UE) and network side equipment establish Radio Resource Control (RRC) connection;
receiving first measurement configuration information and second measurement configuration information issued by the network side equipment based on the RRC connection;
the first measurement configuration information includes a first measurement event that is satisfied by starting inter-frequency measurement for a co-sited inter-frequency neighboring cell when the UE moves to a serving cell center direction, where the first measurement event means that the serving cell signal strength of the UE is higher than a first threshold value;
the second measurement configuration information includes a second measurement event which is satisfied by starting pilot frequency measurement for a pilot frequency neighboring cell of a different station when the UE moves towards the edge direction of a service cell; the second measurement event means that the signal strength of the serving cell of the UE is lower than a second threshold, and the first threshold is greater than the second threshold.
The pilot frequency measurement control device provided by the embodiment of the application comprises:
the system comprises an establishing module, a receiving module and a sending module, wherein the establishing module is used for establishing Radio Resource Control (RRC) connection with User Equipment (UE);
a sending module, configured to issue first measurement configuration information and second measurement configuration information to the UE based on the RRC connection;
the first measurement configuration information includes a first measurement event that is satisfied by starting inter-frequency measurement for a co-sited inter-frequency neighboring cell when the UE moves to a serving cell center direction, where the first measurement event means that the serving cell signal strength of the UE is higher than a first threshold value;
the second measurement configuration information includes a second measurement event which is satisfied by starting pilot frequency measurement for a pilot frequency neighboring cell of a different station when the UE moves towards the edge direction of a service cell; the second measurement event means that the signal strength of the serving cell of the UE is lower than a second threshold, and the first threshold is greater than the second threshold.
Another embodiment of the present application provides a pilot frequency measurement control apparatus, including:
the establishing module is used for establishing Radio Resource Control (RRC) connection with network side equipment;
a receiving module, configured to receive, based on the RRC connection, first measurement configuration information and second measurement configuration information that are issued by the network side device;
the first measurement configuration information includes a first measurement event that is satisfied by starting inter-frequency measurement for a co-sited inter-frequency neighboring cell when the UE moves to a serving cell center direction, where the first measurement event means that the serving cell signal strength of the UE is higher than a first threshold value;
the second measurement configuration information includes a second measurement event which is satisfied by starting pilot frequency measurement for a pilot frequency neighboring cell of a different station when the UE moves towards the edge direction of a service cell; the second measurement event means that the signal strength of the serving cell of the UE is lower than a second threshold, and the first threshold is greater than the second threshold.
By adopting the embodiment of the application, when the UE moves towards the center of the serving cell, aiming at the co-station pilot frequency adjacent cell, the first measurement event can be utilized to trigger the UE to start pilot frequency measurement, namely the pilot frequency measurement is started when the measured signal intensity of the serving cell is higher than a first threshold, and because the signal intensity near the center of the cell is higher, the UE can timely initiate the pilot frequency measurement when moving to the vicinity of the center of the cell and then is switched to the pilot frequency adjacent cell positioned at the center of the cell, in addition, because the A2 event with a higher threshold value is not used, the UE positioned at the edge of the cell is also prevented from starting unnecessary pilot frequency measurement, thereby effectively reducing the loss of the uplink and downlink service rates of the UE. When the UE moves towards the edge of the serving cell, for the inter-cell inter-frequency neighboring cell, the second measurement event may be used to trigger the UE to start the inter-frequency measurement, that is, the inter-frequency measurement is started when the measured signal strength of the serving cell is lower than the second threshold.
Drawings
Fig. 1 is a flowchart illustrating a method for implementing inter-frequency handover by using an a2 event and an a4 event in the prior art;
fig. 2 is a flowchart of an inter-frequency measurement control method according to an embodiment of the present application;
fig. 3 is a diagram illustrating a handover strategy of an LTE inter-frequency networking handover event according to a second embodiment of the present application;
fig. 4 is a schematic structural diagram of an inter-frequency measurement control apparatus according to a third embodiment of the present application;
fig. 5 is a schematic structural diagram of an inter-frequency measurement control apparatus according to a fourth embodiment of the present application.
Detailed Description
In the embodiment of the application, the network side device controls the time when the UE starts the inter-frequency measurement by sending the first measurement configuration information carrying the first measurement event and the second measurement configuration information carrying the second measurement event to the UE. The first measurement event is used for controlling the UE to start the pilot frequency measurement when the UE moves towards the center direction of the serving cell, and the second measurement event is used for controlling the UE to start the pilot frequency measurement when the UE moves towards the edge direction of the serving cell. By adopting the embodiment of the application, when the UE moves towards the center of the serving cell, aiming at the co-station pilot frequency adjacent cell, the first measurement event can be utilized to trigger the UE to start pilot frequency measurement, namely the pilot frequency measurement is started when the measured signal intensity of the serving cell is higher than a first threshold, and because the signal intensity near the center of the cell is higher, the UE can timely initiate the pilot frequency measurement when moving to the vicinity of the center of the cell and then is switched to the pilot frequency adjacent cell positioned at the center of the cell, in addition, because the A2 event with a higher threshold value is not used, the UE positioned at the edge of the cell is also prevented from starting unnecessary pilot frequency measurement, thereby effectively reducing the loss of the uplink and downlink service rates of the UE. When the UE moves towards the edge of the serving cell, for the inter-cell inter-frequency neighboring cell, the second measurement event may be used to trigger the UE to start the inter-frequency measurement, that is, the inter-frequency measurement is started when the measured signal strength of the serving cell is lower than the second threshold.
Example one
As shown in fig. 2, a flowchart of an inter-frequency measurement control method provided in an embodiment of the present application includes the following steps:
s201: an Evolved Node B (eNodeB) establishes an RRC connection with a UE.
S202: and the eNodeB issues the first measurement configuration information and the second measurement configuration information to the UE based on the RRC connection.
Here, the first measurement configuration information includes a first measurement event that is satisfied by starting inter-frequency measurement for a co-sited inter-frequency neighboring cell when the UE moves to the serving cell center direction, where the first measurement event is that the serving cell signal strength of the UE is higher than a first threshold value; the second measurement configuration information includes a second measurement event that is satisfied by starting pilot frequency measurement for the inter-site pilot frequency adjacent cell when the UE moves to the edge direction of the serving cell, and the second measurement event means that the signal intensity of the serving cell of the UE is lower than a second threshold value. Wherein the first threshold value is greater than the second threshold value.
Specifically, according to the definition of a Long Term Evolution (LTE) measurement event in the 3rd Generation Partnership Project (3 GPP) standard protocol, a first measurement event included in the first measurement configuration information may be identified by an a1 event, and a second measurement event included in the second measurement configuration information may be identified by an a2 event. For the sake of convenience of distinction, in the embodiment of the present application, the first measurement event is identified by a1_1, and the second measurement event is identified by a2_ 2.
In addition, the first measurement configuration information further includes a fifth measurement event that is satisfied by the UE when the UE stops starting the inter-frequency measurement, and is used to instruct the UE to stop measuring the signal strength of the inter-frequency neighboring cell if the fifth measurement event is satisfied after the UE starts the inter-frequency measurement. Here, the fifth measurement event means that the serving cell signal strength of the UE is lower than a fifth threshold value. The fifth measurement event may be identified as a2_1, as defined for LTE measurement events in the 3GPP standard protocol.
The second measurement configuration information further includes a sixth measurement event that is satisfied by the UE when the pilot frequency measurement is stopped, and is used to instruct the UE to stop measuring the signal strength of the pilot frequency neighboring cell if the sixth measurement event is satisfied after the pilot frequency measurement is started. Here, the sixth measurement event means that the serving cell signal strength of the UE is higher than a sixth threshold value. The sixth measurement event may be identified as a1_2, as defined for LTE measurement events in 3GPP standard protocols. Wherein the fifth threshold is greater than the sixth threshold. And the fifth threshold value is smaller than the first threshold value, and the sixth threshold value is larger than the second threshold value. In the embodiment of the present application, the threshold values of the above four events are respectively a first threshold value, a fifth threshold value, a sixth threshold value, and a second threshold value, which are arranged in descending order.
In specific implementation, the eNodeB may simultaneously issue, to the UE, the first measurement configuration information carrying a1_1 and a2_1 and the second measurement configuration information carrying a2_1 and a2_2 through RRC reconfiguration signaling.
S203: and after receiving the first measurement configuration information and the second measurement configuration information, the UE measures the signal strength of the serving cell.
If the measurement result satisfies the first measurement event a1_1, steps S204 to S207 are performed.
If the measurement result satisfies the second measurement event a2_2, steps S208 to S211 are executed.
Here, the UE may determine the Signal strength of the serving cell by measuring Reference Signal Receiving Power (RSRP) of the serving cell.
S204: and the UE reports the first measurement event report to the eNodeB.
Here, when the measurement result satisfies the first measurement event, that is, when the measured service quality of the serving cell is higher than a preset first threshold value, a first measurement event report is reported to the eNodeB. This situation is applicable to a scenario where the UE moves towards the inter-frequency neighboring cell direction of the cell center.
S205: and the eNodeB issues third measurement configuration information to the UE after receiving the first measurement event report.
Here, the third measurement configuration information is used to instruct the UE to measure the signal strength of the inter-frequency neighboring cell, and the third measurement configuration information includes a third measurement event that is satisfied for performing cell handover. The third measurement event may be defined as an A3 event or an a4 event or an a5 event, as defined for the LTE measurement event in the 3GPP standard protocol. The A3 event is defined as the neighbor cell signal strength being higher than a threshold value than the serving cell signal strength, the a4 event is defined as the neighbor cell quality being higher than a threshold value, and the a5 event is defined as the serving cell signal strength being lower than a threshold value of 1 and the neighbor cell quality being higher than a threshold value of 2. For convenience of distinction, the third measurement event in the embodiment of the present application may be identified by A3_1 or a4_1 or a5_ 1.
S206: and after receiving the third measurement configuration information, the UE measures the signal strength of the pilot frequency adjacent cell, and reports a third measurement event report to the eNodeB after the measurement result meets the third measurement event.
In a specific implementation, after the UE starts measuring the signal strength of the inter-frequency neighboring cell and before the UE reports a third measurement event to the eNodeB, if the measured service quality of the serving cell is lower than a fifth threshold, that is, the fifth measurement event is satisfied, the UE reports the fifth measurement event to the eNodeB. After receiving the fifth measurement event report, the eNodeB sends an instruction to stop inter-frequency measurement to the UE, so as to inform the UE to stop measuring the signal strength of the inter-frequency neighboring cell. In this case, the UE will not report the third measurement event to the eNodeB, i.e. will not trigger the handover procedure of the subsequent inter-frequency neighboring cell.
S207: the eNodeB controls the cell handover of the UE according to the received third measurement event report.
Here, the third measurement event report carries the identification information of the inter-frequency neighbor cell to be measured.
In a specific implementation, the eNodeB may determine whether to allow the UE to perform cell handover according to the measured identifier information of the inter-frequency neighboring cell carried in the received third measurement event report.
Specifically, the eNodeB allows the UE to switch to the first designated cell after determining that the identifier information of the inter-frequency neighboring cell carried in the third measurement event report is the identifier information of the first designated cell, and rejects the UE to perform cell switching if the identifier information of the inter-frequency neighboring cell carried in the third measurement event report is the identifier information of the first designated cell; the serving cell of the UE and the first designated cell belong to the same base station or the same physical site.
Here, the first designated cell may be an inter-frequency neighboring cell located at a cell center position. And if the identification information of the pilot frequency adjacent cell carried in the third measurement event report is the pilot frequency adjacent cell of the non-cell center position, the eNodeB rejects the UE for cell switching.
S208: and the UE reports the second measurement event report to the eNodeB.
Here, when the measurement result satisfies the second measurement event, i.e. when the measured service quality of the serving cell is lower than a preset second threshold value, a second measurement event report is reported to the eNodeB. This situation is applicable to a scenario in which the UE moves to the inter-frequency neighboring cell direction at the cell edge, and may specifically be a scenario in which the UE moves to the inter-frequency neighboring cell edge direction at different base stations.
S209: and after receiving the second measurement event report, the eNodeB issues fourth measurement configuration information to the UE.
Here, the fourth measurement configuration information is used to instruct the UE to measure the signal strength of the inter-frequency neighboring cell, and the fourth measurement configuration information includes a fourth measurement event that is satisfied for performing cell handover. According to the definition of the LTE measurement event in the 3GPP standard protocol, the fourth measurement event may also be defined as an A3 event or an a4 event or an a5 event. For convenience of distinction, the fourth measurement event in the embodiment of the present application may be identified by A3_2 or a4_2 or a5_ 2. The value of the threshold value set in the fourth measurement event may be the same as or different from the value of the threshold value set in the fifth measurement event.
S210: and after receiving the fourth measurement configuration information, the UE measures the signal strength of the pilot frequency adjacent cell, and reports a fourth measurement event report to the eNodeB after the measurement result meets the fourth measurement event.
In a specific implementation, after the UE starts to measure the signal strength of the inter-frequency neighboring cell and before the UE reports a fourth measurement event to the eNodeB, if the measured service quality of the serving cell is higher than a sixth threshold, that is, the measured service quality of the serving cell meets a sixth measurement event, the UE reports the sixth measurement event to the eNodeB. After receiving the sixth measurement event report, the eNodeB sends an indication to the UE to stop inter-frequency measurement, so as to inform the UE to stop measuring the signal strength of the inter-frequency neighboring cell. In this case, the UE will not report the fourth measurement event reported by the eNodeB, i.e. will not trigger the handover procedure of the subsequent inter-frequency neighboring cell.
S211: the eNodeB controls the cell handover of the UE according to the received fourth measurement event report.
Here, the fourth measurement event report also carries the identifier information of the inter-frequency neighboring cell to be measured.
In a specific implementation, the eNodeB may determine whether to allow the UE to perform cell handover according to the measured identifier information of the inter-frequency neighboring cell carried in the received fourth measurement event report.
Specifically, the eNodeB allows the UE to switch to the second specified cell after determining that the identifier information of the inter-frequency neighboring cell carried in the fourth measurement event report is the identifier information of the second specified cell, and otherwise, rejects the UE to perform cell switching; wherein the serving cell and the second designated cell of the UE belong to different base stations and physical sites.
Here, the first designated cell may be an inter-frequency neighboring cell in a different base station. And if the identification information of the pilot frequency adjacent cell carried in the fourth measurement event report is the same-station pilot frequency adjacent cell, the eNodeB rejects the UE to perform cell switching.
In addition, the execution subject for implementing the method provided by the embodiment of the present application is not limited to the eNodeB, and may be any network side device capable of implementing the above functions.
By adopting the embodiment of the application, when the UE moves towards the center of the serving cell, aiming at the co-station pilot frequency adjacent cell, the first measurement event can be utilized to trigger the UE to start pilot frequency measurement, namely the pilot frequency measurement is started when the measured signal intensity of the serving cell is higher than a first threshold, and because the signal intensity near the center of the cell is higher, the UE can timely initiate the pilot frequency measurement when moving to the vicinity of the center of the cell and then is switched to the pilot frequency adjacent cell positioned at the center of the cell, in addition, because the A2 event with a higher threshold value is not used, the UE positioned at the edge of the cell is also prevented from starting unnecessary pilot frequency measurement, thereby effectively reducing the loss of the uplink and downlink service rates of the UE. When the UE moves towards the edge of the serving cell, for the inter-cell inter-frequency neighboring cell, the second measurement event may be used to trigger the UE to start the inter-frequency measurement, that is, the inter-frequency measurement is started when the measured signal strength of the serving cell is lower than the second threshold.
Example two
As shown in fig. 3, a diagram illustrating a handover strategy of a handover event of an LTE inter-frequency networking according to a second embodiment of the present application is provided. An F-band cell and a D-band cell are deployed on an eNodeB _1 site, and the D-band cell is located at a cell center position. D frequency band cells are deployed on the eNodeB _2 site.
When the UE occupies the F frequency band cell to initiate service, after establishing RRC connection with eNodeB _1, eNodeB _1 will issue two sets of measurement configuration information to the UE simultaneously through RRC reconfiguration signaling. The first measurement configuration information carries an a1_1 measurement event and an a2_1 measurement event, and is used for controlling the UE to start inter-frequency measurement when the UE moves towards the serving cell center. The second measurement configuration information carries an a1_2 measurement event and an a2_2 measurement event, and is used for controlling the UE to start inter-frequency measurement when the UE moves towards the edge of the serving cell.
In a specific implementation, when the UE moves to the direction of the D-band cell in the same station, if the RSRP of the occupied F-band cell is measured to satisfy the a1_1 measurement event, that is, the RSRP of the occupied F-band cell is measured to be greater than the first threshold, the UE reports the a1_1 measurement event report to the eNodeB _ 1. After receiving the a1_1 measurement event report, eNodeB _1 issues third measurement configuration information carrying a third measurement event to the UE through an RRC reconfiguration signaling, so as to instruct the UE to measure the RSRP of the inter-frequency neighboring cell. Here, the third measurement event is identified with an a4_1 measurement event. And after receiving the A4_1 measurement event, the UE measures the RSRP of the pilot frequency adjacent cell. And when the RSRP of the pilot frequency adjacent cell measured by the UE meets the A4_1 measurement event, reporting an A4_1 measurement event report to the eNodeB _ 1.
Here, after receiving the a4_1 measurement event report, eNodeB _1 determines whether the identifier information of the measured pilot frequency neighboring cell carried in the a4_1 measurement event report is a peer-to-peer D-band neighboring cell, if so, triggers a subsequent pilot frequency handover procedure, otherwise, does not perform subsequent processing. In the embodiment of the present application, the subsequent inter-frequency handover procedure triggered by eNodeB _1 is the same as the inter-frequency handover procedure in the prior art, and details thereof are not described here.
As can be seen from the above process, when the UE moves to the co-located D-band cell, the measurement event a1_1 may be used to trigger the start of inter-frequency measurement, and the measurement event a4_1 may be used to trigger the handover of the inter-frequency neighboring cell.
Further, when the UE moves to the co-sited D band cell direction, there may occur a case where the a2_1 measurement event has been satisfied before the a4_1 measurement event is satisfied after the a1_1 measurement event is satisfied. For example, after moving a certain distance to the cell direction of the co-located D-band and starting the inter-frequency measurement, the UE continues to move in the opposite direction. In this scenario, there may be a2_1 measurement event that has been satisfied before the a4_1 measurement event is satisfied, and the UE will continue to report a2_1 measurement event report to the eNodeB. After receiving the a2_1 measurement event report, the eNodeB sends an indication to the UE to stop inter-frequency measurement, so as to inform the UE to stop measuring the signal strength of the inter-frequency neighbor. In this case, the UE will not report the a4_1 measurement event reported to the eNodeB, i.e. will not trigger the handover procedure of the subsequent inter-frequency neighbor.
The suggested value for the first threshold set in the a1_1 measurement event may be-80 dbm, which may range between-90 and-75 dbm. In practical application, the first threshold value can be adjusted according to practical situations, so that the UE can be switched from the F frequency band cell to the D frequency band cell of the same station in time. Moreover, the difference of 3dbm is reserved for setting the fifth threshold value of the a2_1 measurement event and the first threshold value of the a1_1 measurement event, so as to avoid frequently triggering the a2_1 measurement event, which causes the interruption of the inter-frequency measurement process. For example, the threshold value for the A2_1 measurement event may be set to-83 dbm.
In a specific implementation, when the UE moves to the direction of the D-band cell of the different station, if it is measured that the RSRP of the occupied F-band cell meets the a2_2 measurement event, that is, it is measured that the RSRP of the occupied F-band cell is smaller than the second threshold, the UE reports an a2_2 measurement event report to the eNodeB _ 1. After receiving the a2_2 measurement event report, eNodeB _1 issues fourth measurement configuration information carrying a fourth measurement event to the UE through an RRC reconfiguration signaling, so as to instruct the UE to measure the RSRP of the inter-frequency neighboring cell. Here, the fourth measurement event is identified with an a4_2 measurement event. And after receiving the A4_2 measurement event, the UE measures the RSRP of the pilot frequency adjacent cell. And when the RSRP of the pilot frequency adjacent cell measured by the UE meets the A4_2 measurement event, reporting an A4_2 measurement event report to an eNodeB _ 1.
Here, after receiving the a4_2 measurement event report, eNodeB _1 determines whether the identifier information of the measured pilot frequency neighboring cell carried in the a4_2 measurement event report is a pilot D frequency band neighboring cell, if so, triggers a subsequent pilot frequency handover procedure, otherwise, does not perform subsequent processing. In the embodiment of the present application, the subsequent inter-frequency handover procedure triggered by eNodeB _1 is the same as the inter-frequency handover procedure in the prior art, and details thereof are not described here.
As can be seen from the above process, when the UE moves to the direction of the cell in the different-frequency band D, the measurement event a2_2 may be used to trigger the start of the different-frequency measurement, and the measurement event a4_2 may be used to trigger the handover of the different-frequency neighboring cell.
In addition, when the UE moves to the direction of the cell of the alien D band, there may occur a case where the a1_2 measurement event is satisfied before the a4_2 measurement event is satisfied after the a2_2 measurement event is satisfied. For example, after moving a certain distance to the cell direction of the different-station D-band and starting the different-frequency measurement, the UE continues to move in the opposite direction. In this scenario, there may be a1_2 measurement event that has been satisfied before the a4_2 measurement event is satisfied, and the UE will continue to report a1_2 measurement event report to the eNodeB. After receiving the a1_2 measurement event report, the eNodeB sends an indication to the UE to stop inter-frequency measurement, so as to inform the UE to stop measuring the signal strength of the inter-frequency neighbor. In this case, the UE will not report the a4_2 measurement event reported to the eNodeB, i.e. will not trigger the handover procedure of the subsequent inter-frequency neighbor.
The recommended value for the second threshold set in the a2_2 measurement event may be-105 dbm, which may range from-108 to-102 dbm. In practical application, the second threshold value can be adjusted according to practical conditions, so that the UE can be switched from the F frequency band cell to the D frequency band cell of the different station in time. And, the difference of 3dbm is reserved for setting the sixth threshold value of the a1_2 measurement event and the second threshold value of the a2_2 measurement event, so as to avoid frequently triggering the a1_2 measurement event, which causes the interruption of the inter-frequency measurement process. For example, the threshold value for the A1_2 measurement event may be set to-102 dbm.
It can be known from the above flow that, by using the pilot frequency measurement control method provided in the embodiment of the present application as a pilot frequency switching control strategy, when the UE moves towards the center of the serving cell, for the co-sited pilot frequency neighboring cell, the pilot frequency measurement may be triggered by using an a1_1 measurement event, that is, the pilot frequency measurement is started when the measured signal intensity of the F-band cell is higher than the first threshold, because the signal intensity near the center of the cell is higher, the UE can timely initiate the pilot frequency measurement when moving to near the center of the cell, and then switch to the co-sited D-band cell located at the center of the cell, in addition, because an a2 event with a higher threshold is not used, the UE located at the edge of the cell is also prevented from starting unnecessary pilot frequency measurement, and thus the loss of the uplink and downlink service rates of the UE is effectively reduced. When the UE moves towards the edge of the serving cell, for the inter-cell inter-frequency neighboring cell, the a2_2 measurement event may be used to trigger the UE to start inter-frequency measurement, that is, the inter-frequency measurement is started when the measured signal strength of the F-band cell is lower than the second threshold.
Based on the same application concept, the embodiment of the present application further provides a pilot frequency measurement control device corresponding to the pilot frequency measurement control method, and because the principle of solving the problem of the device is similar to that of the pilot frequency measurement control method in the embodiment of the present application, the implementation of the device can refer to the implementation of the method, and repeated details are not repeated.
EXAMPLE III
As shown in fig. 4, a schematic structural diagram of an inter-frequency measurement control apparatus provided in the third embodiment of the present application includes:
an establishing module 41, configured to establish a radio resource control RRC connection with a user equipment UE;
a sending module 42, configured to issue first measurement configuration information and second measurement configuration information to the UE based on the RRC connection;
the first measurement configuration information includes a first measurement event that is satisfied by starting inter-frequency measurement for a co-sited inter-frequency neighboring cell when the UE moves to a serving cell center direction, where the first measurement event means that the serving cell signal strength of the UE is higher than a first threshold value;
the second measurement configuration information includes a second measurement event which is satisfied by starting pilot frequency measurement for a pilot frequency neighboring cell of a different station when the UE moves towards the edge direction of a service cell; the second measurement event means that the signal strength of the serving cell of the UE is lower than a second threshold, and the first threshold is greater than the second threshold.
Optionally, the sending module 42 is specifically configured to:
and issuing the first measurement configuration information and the second measurement configuration information through RRC reconfiguration signaling.
Optionally, the apparatus further comprises:
a first receiving module 43, configured to receive a first measurement event report reported by the UE after the sending module issues the first measurement configuration information and the second measurement configuration information to the UE; the first measurement event report is used to indicate that the first measurement event is satisfied;
the sending module 42 is further configured to:
sending third measurement configuration information to the UE, wherein the third measurement configuration information is used for indicating the UE to measure the signal strength of the pilot frequency adjacent cell; the third measurement configuration information comprises a third measurement event which is satisfied by cell switching;
the first receiving module 43 is further configured to:
receiving a third measurement event report reported by the UE, wherein the third measurement event report is used for indicating that a third measurement event is met;
the device further comprises:
a first control module 44, configured to control cell handover of the UE according to the third measurement event report received by the first receiving module.
Optionally, the third measurement event report carries identification information of the measured pilot frequency neighboring cell;
the first control module 44 is specifically configured to:
after determining that the identification information of the pilot frequency neighboring cell carried in the third measurement event report is the identification information of a first designated cell, allowing the UE to be switched to the first designated cell, otherwise, rejecting the UE to perform cell switching; wherein the serving cell of the UE and the first designated cell belong to the same base station or the same physical site.
Optionally, the first measurement configuration information further includes a fifth measurement event that is satisfied by the UE when the UE stops starting the inter-frequency measurement, and is used to indicate that the UE stops measuring the signal strength of the inter-frequency neighboring cell if the fifth measurement event is satisfied after the UE starts the inter-frequency measurement.
Optionally, the apparatus further comprises:
a second receiving module 45, configured to receive a second measurement event report reported by the UE after the sending module issues the first measurement configuration information and the second measurement configuration information to the UE; the second measurement event report is used to indicate that the second measurement event is satisfied;
the sending module 42 is further configured to:
issuing fourth measurement configuration information to the UE, wherein the fourth measurement configuration information is used for indicating the UE to measure the signal strength of the pilot frequency adjacent cell; the fourth measurement configuration information includes a fourth measurement event satisfied by cell handover;
the second receiving module 45 is further configured to:
receiving a fourth measurement event report reported by the UE, wherein the fourth measurement event report is used for indicating that a fourth measurement event is met;
the device further comprises:
a second control module 46, configured to control cell handover of the UE according to the fourth measurement event report received by the second receiving module.
Optionally, the fourth measurement event report carries identification information of the measured pilot frequency neighboring cell;
the second control module 46 is specifically configured to:
after determining that the identification information of the pilot frequency neighboring cell carried in the fourth measurement event report is the identification information of a second designated cell, allowing the UE to be switched to the second designated cell, otherwise, rejecting the UE to perform cell switching; wherein the serving cell of the UE and the second designated cell belong to different base stations and physical station addresses.
Optionally, the second measurement configuration information further includes a sixth measurement event that is satisfied by the UE when the UE stops starting the inter-frequency measurement, and is used to indicate that the UE stops measuring the signal strength of the inter-frequency neighboring cell if the sixth measurement event is satisfied after the UE starts the inter-frequency measurement.
Example four
As shown in fig. 5, a schematic structural diagram of an inter-frequency measurement control apparatus provided in the fourth embodiment of the present application includes:
an establishing module 51, configured to establish a radio resource control RRC connection with a network side device;
a receiving module 52, configured to receive, based on the RRC connection, first measurement configuration information and second measurement configuration information sent by the network side device;
the first measurement configuration information includes a first measurement event that is satisfied by starting inter-frequency measurement for a co-sited inter-frequency neighboring cell when the UE moves to a serving cell center direction, where the first measurement event means that the serving cell signal strength of the UE is higher than a first threshold value;
the second measurement configuration information includes a second measurement event which is satisfied by starting pilot frequency measurement for a pilot frequency neighboring cell of a different station when the UE moves towards the edge direction of a service cell; the second measurement event means that the signal strength of the serving cell of the UE is lower than a second threshold, and the first threshold is greater than the second threshold.
Optionally, the receiving module 52 is specifically configured to:
and receiving the first measurement configuration information and the second measurement configuration information which are issued by the network side equipment through RRC reconfiguration signaling.
Optionally, the apparatus further comprises:
a first sending module 53, configured to report a first measurement event report to the network-side device after the receiving module receives the first measurement configuration information and the second measurement configuration information sent by the network-side device; the first measurement event report is used to indicate that the first measurement event is satisfied;
the receiving module 52 is further configured to:
receiving third measurement configuration information issued by the network side equipment, wherein the third measurement configuration information is used for indicating the UE to measure the signal strength of the pilot frequency adjacent cell; the third measurement configuration information comprises a third measurement event which is satisfied by cell switching;
the first sending module 53 is further configured to:
reporting a third measurement event report to the network side equipment, so that the network side equipment controls the cell switching of the UE according to the received third measurement event report; the third measurement event report is used to indicate that a third measurement event is satisfied.
Optionally, the first sending module 53 is specifically configured to:
and reporting a third measurement event report carrying the identification information of the measured pilot frequency neighboring cell to the network side equipment, so that the network side equipment controls the cell switching of the UE according to the identification information of the pilot frequency neighboring cell carried in the received third measurement event report.
Optionally, the first measurement configuration information further includes a fifth measurement event that is satisfied by the UE when the UE stops starting the inter-frequency measurement, and is used to indicate that the UE stops measuring the signal strength of the inter-frequency neighboring cell if the fifth measurement event is satisfied after the UE starts the inter-frequency measurement.
Optionally, the apparatus further comprises:
a second sending module 54, configured to report a second measurement event report to the network-side device after the receiving module receives the first measurement configuration information and the second measurement configuration information sent by the network-side device; the second measurement event report is used to indicate that the second measurement event is satisfied;
the receiving module 52 is further configured to:
receiving fourth measurement configuration information issued by the network side equipment, and indicating the UE to measure the signal strength of the pilot frequency adjacent cell; the fourth measurement configuration information includes a fourth measurement event satisfied by cell handover;
the second sending module 54 is further configured to:
reporting a fourth measurement event report to the network side equipment, so that the network side equipment controls the cell switching of the UE according to the received fourth measurement event report; the fourth measurement event report is to indicate that a fourth measurement event is satisfied.
Optionally, the second sending module 54 is specifically configured to:
and reporting a fourth measurement event report carrying the identification information of the measured pilot frequency neighboring cell to the network side equipment, so that the network side equipment controls the cell switching of the UE according to the identification information of the pilot frequency neighboring cell carried in the received fourth measurement event report.
Optionally, the second measurement configuration information further includes a sixth measurement event that is satisfied by the UE when the UE stops starting the inter-frequency measurement, and is used to indicate that the UE stops measuring the signal strength of the inter-frequency neighboring cell if the sixth measurement event is satisfied after the UE starts the inter-frequency measurement. .
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (18)
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| CN111465049B (en) * | 2019-01-21 | 2023-05-05 | 中国移动通信有限公司研究院 | Measurement processing method, device, related equipment and storage medium |
| CN112243272B (en) * | 2019-07-16 | 2022-12-16 | 中国移动通信集团浙江有限公司 | Pilot frequency switching method and device |
| EP4017113B1 (en) | 2019-08-29 | 2023-11-22 | Huawei Technologies Co., Ltd. | Communication method and device |
| CN112770362B (en) * | 2019-10-21 | 2022-11-29 | 中国移动通信集团安徽有限公司 | Cell switching method, device and equipment |
| CN115843086A (en) * | 2019-11-30 | 2023-03-24 | 华为技术有限公司 | Cell measurement method, cell measurement device, terminal device, chip and storage medium |
| CN113055950B (en) * | 2019-12-27 | 2023-04-11 | 成都鼎桥通信技术有限公司 | Method and device for switching public network and private network |
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