CN107295593B - Cell switching method and device in carrier aggregation - Google Patents
Cell switching method and device in carrier aggregation Download PDFInfo
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- CN107295593B CN107295593B CN201610226008.9A CN201610226008A CN107295593B CN 107295593 B CN107295593 B CN 107295593B CN 201610226008 A CN201610226008 A CN 201610226008A CN 107295593 B CN107295593 B CN 107295593B
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- 238000004220 aggregation Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 73
- 239000000969 carrier Substances 0.000 description 8
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
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Abstract
The application provides a cell switching method and device in carrier aggregation. In the invention, an eNB configures an A7 measurement event for UE, the UE detects whether the trigger condition of the A7 measurement event is met when moving from a first cell to a second cell, if so, the UE reports the A7 measurement event to the eNB, and when the eNB receives the A7 measurement event reported by the UE, the high-requirement data service executed by the UE is configured to be switched from the first cell to the second cell, thereby realizing the timely switching of the high-requirement data service to the cell with good signal quality and improving the performance of the high-requirement data service.
Description
Technical Field
The present application relates to network communication technologies, and in particular, to a cell handover method and apparatus in Carrier Aggregation (CA).
Background
The release (R)10 of the 3GPP introduces a CA technology which can aggregate 5 LTE Component Carriers (CC) together, thereby realizing the transmission bandwidth of 100MHz at most and effectively improving the uplink and downlink transmission rate.
In the CA technology, a terminal determines that up to several carriers can be simultaneously used for uplink and downlink transmission according to its own capability, and is enhanced in R13, and the terminal can simultaneously support up to 32 carriers for uplink and downlink transmission. But in these 32 carriers all are assumed to have the same characteristics, i.e. all provide similar quality of service (QoS) to the UE, the UE does not distinguish the transmission characteristics of these carriers.
In fact, however, the characteristics of the component carriers are different, for example, some of the component carriers correspond to cells with good service quality, for example, with good channel quality, lower interference, lower delay, and lower cell load, and vice versa, some of the carriers correspond to cells with poor service quality. Based on this, under such a situation, it is a technical problem to be solved urgently to switch cells for service according to service characteristics in time to ensure that a high-demand data service, such as a Voice over internet Protocol (VoIP) service, can be preferably placed on a cell with better quality all the time.
Disclosure of Invention
The application provides a cell switching method and a cell switching device in carrier aggregation, so as to realize switching of high-demand data service of UE to a cell with better signal quality when the UE moves to the cell with better signal quality.
The technical scheme provided by the application comprises the following steps:
a cell switching method in carrier aggregation comprises the following steps:
a base station eNB configures an A7 measurement event for a terminal UE;
detecting whether a trigger condition of an A7 measurement event is met when the UE moves from a first cell to a second cell, wherein the trigger condition of the A7 measurement event is that the signal quality of the second cell is at least one threshold value higher than the signal quality of the first cell; the first cell and the second cell are both auxiliary cells, the first cell is a working cell with high requirement data service, the second cell is a neighboring cell of the first cell and is not the working cell with high requirement data service;
if yes, the UE reports an A7 measurement event to the eNB;
the eNB receives an A7 measurement event reported by the UE, and configures the high-requirement data service executed by the UE to be switched from a first cell to a second cell, wherein the high-requirement data service at least comprises VoIP service.
A cell switching device in carrier aggregation, which is applied to a base station eNB, comprises:
an a7 measurement event configuration unit, configured to configure an a7 measurement event for a terminal UE;
a receiving unit, configured to receive an a7 measurement event reported by a UE, where the UE detects that a trigger condition of the a7 measurement event satisfies a reported a7 measurement event when the UE moves from a first cell to a second cell, and the trigger condition of the a7 measurement event is that signal quality of the second cell is at least one threshold higher than signal quality of the first cell; the first cell and the second cell are both auxiliary cells, the first cell is a working cell with high requirement data service, the second cell is a neighboring cell of the first cell and is not the working cell with high requirement data service;
the cell switching configuration unit is used for configuring the high-requirement data service executed by the UE to be switched from the first cell to the second cell, and the high-requirement data service at least comprises VoIP service.
A cell switching device in carrier aggregation, which is applied to a terminal UE and is configured with an A7 measurement event, includes:
a reporting unit, configured to detect whether a trigger condition of an a7 measurement event is met when moving from a first cell to a second cell, and if so, report the a7 measurement event to an eNB, where the trigger condition of the a7 measurement event is that signal quality of the second cell is at least one threshold higher than signal quality of the first cell; the first cell and the second cell are both auxiliary cells, the first cell is a working cell with high requirement data service, the second cell is a neighboring cell of the first cell and is not the working cell with high requirement data service;
and the switching unit is used for switching the high-requirement data service from the first cell to the second cell according to the configuration of the base station eNB, wherein the high-requirement data service at least comprises VoIP service.
According to the technical scheme, the eNB configures the A7 measurement event for the UE, so that when the UE moves from the first cell to the second cell, whether the trigger condition of the A7 measurement event is met is detected, if the trigger condition is met, the UE reports the A7 measurement event to the eNB, and when the eNB receives the A7 measurement event reported by the UE, the high-requirement data service executed by the UE is configured to be switched from the first cell to the second cell, so that the high-requirement data service is timely switched to the cell with good signal quality, and the performance of the high-requirement data service is improved.
Drawings
FIG. 1 is a flow chart of a method provided by the present invention;
FIG. 2 is a schematic diagram of cell handover provided by the present invention;
FIG. 3 is a schematic view of the structure of the apparatus according to the present invention;
fig. 4 is a schematic structural diagram of another apparatus provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a flow chart of a method provided by the present invention. As shown in fig. 1, the process may include the following steps:
step 101, the base station eNB configures a7 measurement event for the terminal UE.
Here, the a7 measurement event is defined by the present invention, and is used for measuring the co-frequency or inter-frequency cell, and for measuring the signal quality of the new cell to which the UE moves, for use in the service bearer handover, as described in detail below.
Step 102, when the UE moves from the first cell to the second cell, detecting whether a trigger condition of an a7 measurement event is satisfied, and if so, reporting the a7 measurement event to the eNB by the UE.
When the UE is configured with an a7 measurement event, the UE will detect whether the trigger condition for the a7 measurement event is met when it moves to a new cell. Here, the trigger condition of the a7 measurement event is briefly summarized as:
the signal quality of the second cell is at least one threshold higher than the signal quality of the first cell. The first cell and the second cell are both secondary cells, specifically, the first cell is a working cell with high requirement for data service, and the second cell is a neighboring cell of the first cell but not a working cell with high requirement for data service. The high-demand data service includes some services with higher demand, such as VoIP service.
Specifically, the signal quality of the second cell is at least one threshold higher than the signal quality of the first cell described by the following equation:
mn + Ofn + Ocn-Hys > Mp + Ofp + Ocp + Off (equation 1)
Wherein the signal quality of the second cell is represented by Mn, Ofn, Ocn, Mn: measurement results of the second cell without calculating any offset, Ofn: frequency specific offset on the second cell frequency, Ocn: the configured cell-specific offset of the second cell, and if the second cell is not configured with the cell-specific offset, the Ocn defaults to a set value;
the signal quality of the first cell is denoted by Mp, Ofp, Ocp, Mp: measurement of the first cell without calculating any offset, Ofp: for frequency specific biasing on the first cell frequency, Ocp: a cell specific offset to which the first cell is configured, Ocp defaulting to a set value if the first cell is not configured with a cell specific offset;
hys and Off are threshold values of the signal quality of the second cell higher than that of the first cell, and Hys: the hysteresis parameter defined for the a7 measurement event, Off: the offset parameter defined for the event is measured for a 7.
Preferably, in the present invention, when configuring the above parameters, it is necessary to ensure that the trigger of the a7 measurement event is earlier than the trigger of the a6 event defined by version R10, that is, it is necessary to ensure that the a7 event triggers first, rather than triggering until the critical edge of the handover. Here, the a6 event is for changing cells, that is, configuring one cell for the UE, and additionally configuring one cell for the UE, which is only suitable for intra-frequency measurement, specifically see the a6 event defined by R13.
And 103, the eNB receives the A7 measurement event reported by the UE, and configures the high-demand data service executed by the UE to be switched from the first cell to the second cell.
Specifically, the eNB configuring the handover of the high-demand data service performed by the UE from the first cell to the second cell includes:
the eNB configures a high-demand data service for the UE to be handed over from the first cell to the second cell using an RRC Connection (Connection) Reconfiguration message, see fig. 2 specifically.
Referring to fig. 2, fig. 2 is a schematic diagram of cell handover provided by the present invention. As shown in fig. 2, the method comprises the following steps:
step 201, the eNB sends an RRC Connection Reconfiguration message to the UE;
step 202, the UE receives the RRC Connection Reconfiguration message, switches the high-demand data service from the first cell to the second cell, and sends an RRC Connection Reconfiguration Complete (Complete) message to the eNB after the switching is completed. In this way, handover of the high-demand data service of the UE from the first cell to the second cell is achieved.
Thus, the flow shown in fig. 2 is completed.
The flow shown in fig. 1 is described above.
It should be noted that in the application, Semi-Persistent Scheduling (SPS) is generally used for the high-demand data service. However, after configuring the carrier combination, semi-persistent scheduling can be configured only on a cell defined as a Primary cell (Pcell). In the present invention, in order to provide better service for the UE, SPS is configured on other cells except the Pcell, such as a Secondary cell (Scell). Additionally, SPS may be deployed over multiple cells in order to support different scheduling for different cells.
In the carrier aggregation, a status indication is set for some cells that may be added to the carrier combination (also referred to as cells pre-added to the carrier aggregation), where the status indication is a boolean variable used to indicate whether a cell is in an active state at the time of configuration; based on this, when a cell is added to carrier aggregation, the state indication that the cell is set is identified, and if the cell is in a deactivated state during configuration, the cell is activated to be in an activated state in order to meet high-demand data service, such as service with low tolerance of delay.
Specifically, here, the state indication that the cell is set in the configuration description of the cell, specifically, below a cell index (cellIndex) in the configuration description.
The following takes the configuration description of one cell as an example, and the bold part is the status indication that the cell is set:
the method provided by the invention is described above, and the device provided by the invention is described below:
referring to fig. 3, fig. 3 is a structural view of the apparatus according to the present invention. The device is applied to eNB and comprises the following steps:
an a7 measurement event configuration unit, configured to configure an a7 measurement event for a terminal UE;
a receiving unit, configured to receive an a7 measurement event reported by a UE, where the UE detects that a trigger condition of the a7 measurement event satisfies a reported a7 measurement event when the UE moves from a first cell to a second cell, and the trigger condition of the a7 measurement event is that signal quality of the second cell is at least one threshold higher than signal quality of the first cell; the first cell and the second cell are both auxiliary cells, the first cell is a working cell with high requirement data service, the second cell is a neighboring cell of the first cell and is not the working cell with high requirement data service;
the cell switching configuration unit is used for configuring the high-requirement data service executed by the UE to be switched from the first cell to the second cell, and the high-requirement data service at least comprises VoIP service.
Preferably, the cell switching configuration unit configures the high-demand data service for the UE to be switched from the first cell to the second cell by using an RRC Connection Reconfiguration message.
Preferably, in the present invention, the cell handover configuration unit identifies a state indication that the cell is set when adding cell-to-carrier aggregation, and activates the cell to make the cell in an activated state if the cell is indicated to be in a deactivated state during configuration. The status indication here is a boolean variable indicating whether a cell is active at the time of configuration.
So far, the description of the apparatus shown in fig. 3 is completed.
Referring to fig. 4, fig. 4 is a structural view of another apparatus provided in the present invention. The device is applied to the UE, and is configured with A7 measurement events, which comprise:
a reporting unit, configured to detect whether a trigger condition of an a7 measurement event is met when moving from a first cell to a second cell, and if so, report the a7 measurement event to an eNB, where the trigger condition of the a7 measurement event is that signal quality of the second cell is at least one threshold higher than signal quality of the first cell; the first cell and the second cell are both auxiliary cells, the first cell is a working cell with high requirement data service, the second cell is a neighboring cell of the first cell and is not the working cell with high requirement data service;
and the switching unit is used for switching the high-requirement data service from the first cell to the second cell according to the configuration of the base station eNB, wherein the high-requirement data service at least comprises VoIP service.
Preferably, the trigger of the a7 measurement event is earlier than the trigger of the a6 event defined by version R10;
preferably, the signal quality of the second cell is at least one threshold higher than the signal quality of the first cell by the following formula:
Mn+Ofn+Ocn-Hys＞Mp+Ofp+Ocp+Off
wherein the signal quality of the second cell is represented by Mn, Ofn, Ocn, Mn: measurement results of the second cell without calculating any offset, Ofn: frequency specific offset on the second cell frequency, Ocn: the configured cell-specific offset of the second cell, and if the second cell is not configured with the cell-specific offset, the Ocn defaults to a set value;
the signal quality of the first cell is denoted by Mp, Ofp, Ocp, Mp: measurement of the first cell without calculating any offset, Ofp: for frequency specific biasing on the first cell frequency, Ocp: a cell specific offset to which the first cell is configured, Ocp defaulting to a set value if the first cell is not configured with a cell specific offset;
hys and Off are threshold values of the signal quality of the second cell higher than that of the first cell, and Hys: the hysteresis parameter defined for the a7 measurement event, Off: the offset parameter defined for the event is measured for a 7.
Thus, the description of the apparatus shown in fig. 4 is completed.
The apparatus provided by the present invention has been described above.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A method for cell handover in carrier aggregation is characterized in that the method comprises the following steps:
a base station eNB configures an A7 measurement event for a terminal UE;
detecting whether a trigger condition of an A7 measurement event is met when the UE moves from a first cell to a second cell, wherein the trigger condition of the A7 measurement event is that the signal quality of the second cell is at least one threshold value higher than the signal quality of the first cell; the first cell and the second cell are both auxiliary cells, the first cell is a working cell with high requirement data service, the second cell is a neighboring cell of the first cell and is not the working cell with high requirement data service;
if yes, the UE reports an A7 measurement event to the eNB;
the eNB receives an A7 measurement event reported by the UE, and configures high-requirement data service executed by the UE to be switched from a first cell to a second cell, wherein the high-requirement data service at least comprises VoIP service;
the trigger of the a7 measurement event is earlier than the trigger of the a6 event defined by version R10.
2. The method of claim 1, wherein the signal quality of the second cell is at least one threshold higher than the signal quality of the first cell by the following equation:
Mn+Ofn+Ocn-Hys＞Mp+Ofp+Ocp+Off
wherein the signal quality of the second cell is represented by Mn, Ofn, Ocn, Mn: measurement results of the second cell without calculating any offset, Ofn: frequency specific offset on the second cell frequency, Ocn: the configured cell-specific offset of the second cell, and if the second cell is not configured with the cell-specific offset, the Ocn defaults to a set value;
the signal quality of the first cell is denoted by Mp, Ofp, Ocp, Mp: measurement of the first cell without calculating any offset, Ofp: for frequency specific biasing on the first cell frequency, Ocp: a cell specific offset to which the first cell is configured, Ocp defaulting to a set value if the first cell is not configured with a cell specific offset;
hys and Off are threshold values of the signal quality of the second cell higher than that of the first cell, and Hys: the hysteresis parameter defined for the a7 measurement event, Off: the offset parameter defined for the event is measured for a 7.
3. The method of claim 1, wherein the eNB configuring the handover of the high demand data service performed by the UE from the first cell to the second cell comprises:
and the eNB uses the RRC Connection Reconfiguration message to configure the high-requirement data service for the UE to be switched from the first cell to the second cell.
4. The method of claim 1, further comprising:
setting a state indication for a cell pre-added to carrier aggregation, wherein the state indication is a Boolean variable and is used for indicating whether the cell is in an activated state during configuration;
when a cell is added to carrier aggregation, a state indication that the cell is set is identified, and if the cell is indicated to be in a deactivated state during configuration, the cell is activated so as to be in an activated state.
5. The method according to claim 4, wherein the status indication that the cell is set in a configuration description of the cell, specifically below a cell index cellIndex in the configuration description.
6. A cell switching device in carrier aggregation is applied to a base station eNB and comprises the following components:
an a7 measurement event configuration unit, configured to configure an a7 measurement event for a terminal UE;
a receiving unit, configured to receive an a7 measurement event reported by a UE, where the UE detects that a trigger condition of the a7 measurement event satisfies a reported a7 measurement event when the UE moves from a first cell to a second cell, and the trigger condition of the a7 measurement event is that signal quality of the second cell is at least one threshold higher than signal quality of the first cell; the first cell and the second cell are both auxiliary cells, the first cell is a working cell with high requirement data service, the second cell is a neighboring cell of the first cell and is not the working cell with high requirement data service;
the cell switching configuration unit is used for configuring the high-requirement data service executed by the UE to be switched from the first cell to the second cell, and the high-requirement data service at least comprises VoIP service.
7. The apparatus of claim 6, wherein the cell switch configuring unit configures the high-demand data service for the UE to be switched from the first cell to the second cell using an RRC Connection Reconfiguration message.
8. An apparatus for switching cells in carrier aggregation, applied to a terminal UE, configured with an a7 measurement event, comprising:
a reporting unit, configured to detect whether a trigger condition of an a7 measurement event is met when moving from a first cell to a second cell, and if so, report the a7 measurement event to an eNB, where the trigger condition of the a7 measurement event is that signal quality of the second cell is at least one threshold higher than signal quality of the first cell; the first cell and the second cell are both auxiliary cells, the first cell is a working cell with high requirement data service, the second cell is a neighboring cell of the first cell and is not the working cell with high requirement data service; the trigger of the A7 measurement event is earlier than the trigger of the A6 event defined by version R10;
and the switching unit is used for switching the high-requirement data service from the first cell to the second cell according to the configuration of the base station eNB, wherein the high-requirement data service at least comprises VoIP service.
9. The apparatus of claim 8, wherein:
the signal quality of the second cell being at least a threshold higher than the signal quality of the first cell is described by the following equation:
Mn+Ofn+Ocn-Hys＞Mp+Ofp+Ocp+Off
wherein the signal quality of the second cell is represented by Mn, Ofn, Ocn, Mn: measurement results of the second cell without calculating any offset, Ofn: frequency specific offset on the second cell frequency, Ocn: the configured cell-specific offset of the second cell, and if the second cell is not configured with the cell-specific offset, the Ocn defaults to a set value;
the signal quality of the first cell is denoted by Mp, Ofp, Ocp, Mp: measurement of the first cell without calculating any offset, Ofp: for frequency specific biasing on the first cell frequency, Ocp: a cell specific offset to which the first cell is configured, Ocp defaulting to a set value if the first cell is not configured with a cell specific offset;
hys and Off are threshold values of the signal quality of the second cell higher than that of the first cell, and Hys: the hysteresis parameter defined for the a7 measurement event, Off: the offset parameter defined for the event is measured for a 7.
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| CN201610226008.9A CN107295593B (en) | 2016-04-13 | 2016-04-13 | Cell switching method and device in carrier aggregation |
| PCT/CN2016/096079 WO2017177598A1 (en) | 2016-04-13 | 2016-08-19 | Cell switching method and device in carrier aggregation cell |
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| CN201610226008.9A CN107295593B (en) | 2016-04-13 | 2016-04-13 | Cell switching method and device in carrier aggregation |
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| CN107295593B true CN107295593B (en) | 2019-12-20 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101932045A (en) * | 2009-06-24 | 2010-12-29 | 中兴通讯股份有限公司 | Reporting method for measurement result in carrier aggregation and user equipment |
| CN102045756A (en) * | 2009-10-10 | 2011-05-04 | 中兴通讯股份有限公司 | Measuring method during carrier aggregation and user equipment (UE) |
| CN102158893A (en) * | 2010-02-12 | 2011-08-17 | 中兴通讯股份有限公司 | Measurement report information transmission method and system |
| CN102860065A (en) * | 2010-04-30 | 2013-01-02 | 株式会社Ntt都科摩 | Mobile communication method, mobile station, and wireless base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9185613B2 (en) * | 2011-09-12 | 2015-11-10 | Ofinno Technologies, Llc | Handover in heterogeneous wireless networks |
| CN103889017B (en) * | 2012-12-21 | 2018-02-02 | 普天信息技术研究院有限公司 | A kind of selection of main carrier and switching method |
| CN104602260A (en) * | 2013-10-31 | 2015-05-06 | ***通信集团江苏有限公司 | Heterogeneous network switching method and base station |
| CN104811962B (en) * | 2014-01-24 | 2021-03-09 | 中兴通讯股份有限公司 | Small cell base station state switching method and device |
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- 2016-04-13 CN CN201610226008.9A patent/CN107295593B/en not_active Expired - Fee Related
- 2016-08-19 WO PCT/CN2016/096079 patent/WO2017177598A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932045A (en) * | 2009-06-24 | 2010-12-29 | 中兴通讯股份有限公司 | Reporting method for measurement result in carrier aggregation and user equipment |
| CN102045756A (en) * | 2009-10-10 | 2011-05-04 | 中兴通讯股份有限公司 | Measuring method during carrier aggregation and user equipment (UE) |
| CN102158893A (en) * | 2010-02-12 | 2011-08-17 | 中兴通讯股份有限公司 | Measurement report information transmission method and system |
| CN102860065A (en) * | 2010-04-30 | 2013-01-02 | 株式会社Ntt都科摩 | Mobile communication method, mobile station, and wireless base station |
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| CN107295593A (en) | 2017-10-24 |
| WO2017177598A1 (en) | 2017-10-19 |
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