CN101827369B - Method for adding component carrier in carrier aggregation - Google Patents
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Abstract
The invention provides a method for adding a component carrier in the carrier aggregation, which comprises the following steps that: a base station wireless resource control (RRC) starts the pilot frequency measurement and distributes an RRC connecting reconfiguration message for starting the pilot frequency measurement to user equipment (UE) RRC, wherein the message contains events and the frequency of pilot frequency component carrier (CC); the UE RRC starts the pilot frequency measurement according to the frequency and reports a measuring report containing the pilot frequency CC to the base station RRC when detecting the pilot frequency CC meeting the events; the base station RRC adds the reported pilot frequency CC into the UE and transmits the RRC connecting reconfiguration message for configuring the pilot frequency CC to the UE RRC; and the UE RRC configures the reported pilot frequency CC. The scheme can realize that CC is added under the condition that a subsequent evolution LTE-A (Long Term Evolution-Advanced) system carrier waves are aggregated by using a long-term evolution technology, particularly realize that the CC is added under the conditions that the UE has high quality and downlink data volume is large.
Description
Technical field
The present invention relates to follow-up evolution (LTE-A, the Long Term Evolution-Advanced) technology of Long Term Evolution, relate in particular to the method that increases member carrier (CC, Component carrier) in the LTE-A system carrier aggregation.
Background technology
In LTE-A system carrier aggregation situation, user terminal (UE, User Equipment) may be simultaneously operated on a plurality of CC, and the frequency of each CC is different.And in prior art LTE Rel-8, only support a carrier wave, namely UE only is operated on a carrier wave, does not have the situation of carrier aggregation.
At present, also do not increase the technology of CC in the LTE-A system carrier aggregation, the scheme of increase CC provided by the invention is with reference to the scheme of different-frequency measure in existing LTE Rel-8; Therefore, the flow process by Fig. 1 and 2 is illustrated the method for different-frequency measure in LTE Rel-8 here, the different-frequency measure process of Fig. 1 for being described for base station side, the different-frequency measure process of Fig. 2 for being described for the UE side.
The flow process of Fig. 1 comprises the following steps:
This RRC connects reconfiguration message and comprises that RRC configures the event to UE, is specially event A2, and namely the Serving cell quality is poorer than thresholding 2.
After UE RRC receives RRC connection reconfiguration message, connect to reshuffle to base station RRC feedback RRC and complete message, it has received RRC connection reconfiguration message to inform the base station.
UE RRC measures the Serving cell quality after receiving RRC connection reconfiguration message, and the relation of judgement Serving cell quality and thresholding 2 if satisfy event A2, comprises the information that satisfies event A2 in the measurement report that reports base station RRC.
In this step, this RRC connects reconfiguration message and comprises that RRC configures the event A1 to UE, and namely the Serving cell quality is better than thresholding 1; This RRC connects reconfiguration message and comprises that s-Measure value and base station configure the information of carrying out different-frequency measure to UE, and this information comprises the frequency of alien frequencies carrier wave.
After the RRC for the configuration different-frequency measure that UE RRC reception base station issues connects reconfiguration message, reshuffle to base station RRC feedback RRC connection and complete message, it has received RRC connection reconfiguration message to inform the base station.
After the RRC that in UE RRC receiving step 105, base station RRC issues connects reconfiguration message, to Serving cell Reference Signal Received Power (RSRP, Reference Signal Received Power) measure, whether judge the Serving cell RSRP that measures less than after s-Measure, the Serving cell quality is measured, whether the relation that judges Serving cell quality and thresholding 1 satisfies event A1, if satisfy, report to base station RRC the measurement report that comprises the information that satisfies event A1; Otherwise, do not report measurement report to base station RRC.
In this step, UE stops different-frequency measure after receiving RRC connection reconfiguration message.
After UE RRC receives RRC connection reconfiguration message, connect to reshuffle to base station RRC feedback RRC and complete message, it has received RRC connection reconfiguration message to inform the base station.
The flow process of Fig. 2 comprises the following steps:
Step 201, after UE entered the RRC connection status, UE RRC received the RRC connection reconfiguration message that is used for the configuration different-frequency measure that base station RRC issues.
In this step, this RRC connects reconfiguration message and comprises that event, s-Measure and base station that base station RRC configures to UE configure the information of carrying out different-frequency measure to UE, and this information comprises the frequency of alien frequencies carrier wave.
Step 202, UE RRC reshuffles to base station RRC feedback RRC connection and completes message.
UE RRC reshuffles to base station RRC feedback RRC connection and completes message, has received RRC and has connected reconfiguration message to inform it.
Step 203, UE measures Serving cell RSRP, and whether the Serving cell RSRP that judgement measures if so, does not start different-frequency measure more than or equal to s-Measure; If not, start different-frequency measure, execution in step 204.
Step 204, UE measures the Serving cell quality, judges whether the Serving cell quality satisfies base station in step 201 and configure event to UE, and base station in step 201 is configured to the alien frequencies carrier wave of UE measures; If satisfy report condition, UE RRC sends measurement report to base station RRC, comprises the information whether the Serving cell quality satisfies this event in this measurement report, and the alien frequencies carrier wave measurement result information that measures.
In this step, after base station RRC receives the measurement report of UE RRC transmission, just can determine whether to carry out carrier wave and switch, switch to prior art about carrier wave, exceed here and give unnecessary details.
Above-mentioned is the scheme of different-frequency measure in LTE Rel-8.
For the situation of LTE-A system carrier aggregation, UE may be simultaneously operated on a plurality of CC, and the frequency of each CC is different, has proposed at present by realize increasing the scheme of CC according to event A3, event A4 and event A5.Event A3 is that adjacent cell is better than Serving cell quality; Event A4 is that adjacent cell is better than thresholding 3; Event A5 is, Serving cell is poorer than thresholding 4, and adjacent cell is better than thresholding 5.Existing scheme is: if satisfy at least one in event A3, event A4 and event A5 about the alien frequencies CC of UE, the CC that this CC can be increased to this UE concentrates; But existing scheme does not propose to increase in perfect carrier aggregation the scheme of CC, can not really realize increasing CC in carrier aggregation.
Summary of the invention
The invention provides a kind of method that increases CC in carrier aggregation, the method can realize increasing CC in LTE-A system carrier aggregation situation.
Increase the method for CC in a kind of carrier aggregation, the method comprises:
Base station RRC starts different-frequency measure, issues to UE RRC the RRC that starts different-frequency measure and connects reconfiguration message, and this RRC connects the frequency that comprises event and alien frequencies member carrier CC in reconfiguration message;
UE RRC starts different-frequency measure according to described frequency, when the alien frequencies CC that satisfies described event being detected, UE RRC is to base station RRC reporting measurement reports, and the described alien frequencies CC that satisfies described event is called and reports alien frequencies CC, described measurement report to comprise the described alien frequencies CC that reports;
After base station RRC receives the described measurement report of UE RRC transmission, be that this UE increases the described alien frequencies CC that reports, and connect reconfiguration message to the described RRC of alien frequencies CC that reports of UE RRC transmission configuration;
After UE RRC receives the described RRC that reports alien frequencies CC of configuration that base station RRC sends and connects reconfiguration message, configure the described alien frequencies CC that reports.
Can find out from such scheme, in the present invention, base station RRC and UE RRC start respectively different-frequency measure, when UE RRC detects the alien frequencies CC that satisfies event, report this alien frequencies CC to base station RRC; Afterwards, base station and UE increase respectively this alien frequencies CC.Thereby, realized increasing CC in LTE-A system carrier aggregation situation.
Description of drawings
Fig. 1 is the method flow diagram that in LTE Rel-8, base station side is carried out different-frequency measure;
Fig. 2 is the method flow diagram that in LTE Rel-8, the UE side is carried out different-frequency measure;
Fig. 3 increases the method flow schematic diagram of CC in LTE-A system carrier aggregation of the present invention;
Fig. 4 increases the method flow diagram example one of CC in LTE-A system carrier aggregation of the present invention;
Fig. 5 increases the method flow diagram example two of CC in LTE-A system carrier aggregation of the present invention;
Fig. 6 increases the method flow diagram example three of CC in LTE-A system carrier aggregation of the present invention.
Embodiment
The present invention uses the different-frequency measure process, and realizing increases CC in the LTE-A system carrier aggregation, and this realization flow is specifically shown in Figure 3, comprises the following steps:
In this step, this RRC connects the frequency that comprises event and alien frequencies CC in reconfiguration message.This event can be at least one in event A3, event A4 and event A5, can be also other events that define according to actual needs.
The described alien frequencies CC that satisfies described event is called and reports alien frequencies CC, described measurement report to comprise the described alien frequencies CC that reports.
In the flow process of Fig. 3, base station RRC and UE RRC start respectively different-frequency measure, and the condition of each self-starting different-frequency measure can be set as different situations according to actual needs.Describe below by three embodiment.
Embodiment one, and in step 301, base station RRC can just start different-frequency measure after knowing that UE enters the RRC connection status, continues to issue to UE the RRC that starts different-frequency measure and connects reconfiguration message; Correspondingly, UE RRC just starts different-frequency measure after receiving RRC that base station RRC issues and connecting reconfiguration message, and CC detects to alien frequencies.For this situation, UE RRC need not Serving cell RSRP is measured and judges the relation of Serving cell RSRP and s-Measure after receiving RRC that base station RRC issues and connecting reconfiguration message; During specific implementation, can comprise s-Measure in the RRC connection reconfiguration message in step 301, in step 302, after the RRC of the startup different-frequency measure that UE RRC reception base station RRC sends connects reconfiguration message, ignore s-Measure, start different-frequency measure; During specific implementation, the RRC in step 301 does not connect in reconfiguration message and comprises s-Measure.The back also will be elaborated to the present embodiment by the flow process of Fig. 4.
Embodiment two, and in step 301, base station RRC starts different-frequency measure and specifically comprises: according to existing flow process of carrying out different-frequency measure, if base station RRC receives the measurement report that comprises event A1 that UE reports, judge and do not start different-frequency measure; For this situation, the base station user detects in the face of the downlink data amount, when monitoring the downlink data amount when very large, sends indication to base station RRC; Base station RRC starts different-frequency measure after receiving the indication of base station user's face transmission.The back also will be elaborated to the present embodiment by the flow process of Fig. 5.Mode for UE side startup different-frequency measure in the present embodiment is not construed as limiting, after the RRC that receives the startup different-frequency measure that base station RRC issues connected reconfiguration message, UE can judge whether to start different-frequency measure according to the relation between Serving cell RSRP and s-Measure; Also can ignore s-Measure, after the RRC that receives the startup different-frequency measure that base station RRC issues connects reconfiguration message, just start different-frequency measure; Can also start different-frequency measure according to the indication of UE user's face, this mode will be elaborated in the following embodiments.
In prior art, the event that comprises in the measurement report that base station RRC reports according to UE RRC determines whether to start different-frequency measure, if the event A1 that comprises in measurement report does not start different-frequency measure; Suppose that UE uses 2 CC, UE RRC judges Serving cell RSRP more than or equal to s-Measure, and satisfies A1, namely the quality of these two CC all higher than configure in the A1 event report thresholding the time, report the measurement report that comprises A1 to base station RRC.Adopt existing scheme, even exist good alien frequencies CC to be used by this UE, but because base station RRC is not activated different-frequency measure, UE can't measure these good alien frequencies CC and then reporting measurement reports.If this moment, the base station had mass data to be handed down to this UE, and base station RRC can't increase the CC of UE, has just limited the maximum available bandwidth of UE.Therefore, in embodiment two, do not start different-frequency measure if base station RRC judges, base station user's face also detects the downlink data amount, to start different-frequency measure.
Embodiment three, and in step 301, base station RRC starts different-frequency measure and specifically comprises: according to the existing flow startup different-frequency measure that carries out different-frequency measure.In the present embodiment, the UE side can start different-frequency measure according to the indication of UE user's face, particularly, the RRC that supposes the startup different-frequency measure that issues in step 301 connects in reconfiguration message and comprises s-Measure, in step 302, UE RRC startup different-frequency measure comprises: after the RRC of the startup different-frequency measure that UERRC reception base station RRC issues connects reconfiguration message, judge Serving cell RSRP more than or equal to s-Measure, do not carry out different-frequency measure; UE user detects in the face of the downlink data amount, when monitoring the downlink data amount when very large, sends indication to UE RRC; UE RRC ignores s-Measure after receiving the indication of UE user's face transmission, starts different-frequency measure.The back also will be elaborated to the present embodiment by the flow process of Fig. 6.
In prior art, for UE, connect reconfiguration message by RRC and configure to UE even base station RRC carries out needs the CC of different-frequency measure, if UE measures present Serving cell RSRP more than or equal to s-Measure, UE can not carry out different-frequency measure yet, just can't report to trigger the measurement report that CC measures yet; This will cause base station RRC the second best in quality alien frequencies CC can be configured to UE.If this moment, the base station had mass data to be handed down to UE, and the base station can't increase the CC of UE, and this situation has equally also limited the maximum available bandwidth of UE.Therefore, in embodiment three, do not start different-frequency measure if UE RRC judges, UE user's face also detects the downlink data amount, to start different-frequency measure.
Service CC quality for UE is better, and the situation that the downlink data amount is larger, embodiment two and embodiment three can remove base station RRC and UE RRC to starting the restriction of different-frequency measure, increase the CC of UE, and then the maximum available bandwidth of increase UE, the service transmission rate of raising UE.And in embodiment one, base station RRC and UE RRC startup different-frequency measure are not limited, the service CC quality that not only can apply to UE is better, and the larger situation of downlink data amount, can also apply to other situations.
The below is elaborated to the flow process of Fig. 4, and it comprises the following steps:
In this step, this RRC connects the frequency that comprises event and alien frequencies CC in reconfiguration message.In the present embodiment, suppose that this event is event A3, event A4 or event A5.
In the present embodiment, in base station side, the event A2 that need not to comprise according to the UE reporting measurement reports as prior art determines whether to start different-frequency measure; But after UE entered the RRC connection status, the base station started different-frequency measure always, spontaneously issued to UR the RRC that starts different-frequency measure and connected reconfiguration message.
Here, the alien frequencies CC that satisfies RRC and connect the event that comprises in reconfiguration message is called reports alien frequencies CC, described measurement report to comprise the described alien frequencies CC that reports.
Step 405 after UE RRC receives the described RRC that reports alien frequencies CC of configuration that base station RRC sends and connects reconfiguration message, configures the described alien frequencies CC that reports; And reshuffle to base station RRC feedback RRC connection and complete message, received RRC and connected reconfiguration message to inform it.
After the RRC that receives the startup different-frequency measure that base station RRC issues due to UE RRC in this method connects reconfiguration message, just start different-frequency measure, CC detects to alien frequencies; And do not need to use s-Measure to judge whether to carry out different-frequency measure; Therefore, the RRC connection that in step 401, base station RRC issues is reshuffled and can not carried s-Measure, and perhaps, base station RRC still carries s-Measure in the RRC connection that issues is reshuffled, but UE ignores s-Measure after receiving, and directly starts different-frequency measure.
Configure described report alien frequencies CC after, just can adopt the described alien frequencies CC that reports of configuration to carry out business data transmission.
The below is elaborated to the flow process of Fig. 5, and it comprises the following steps:
Step 501, base station RRC receives the measurement report that comprises event A1 that UE reports, and judges not start different-frequency measure.
According to existing flow process of carrying out different-frequency measure, if base station RRC receives the measurement report that comprises event A1 that UE reports, judge and do not start different-frequency measure.Particularly, for example can be for carrying out the flow process of different-frequency measure according to Fig. 1, when carrying out to step 103 from step 101, just can judge and do not start different-frequency measure.
Step 502, the base station user detects in the face of the downlink data amount, when monitoring the downlink data amount when very large, sends indication to base station RRC.
The amount of downlink data described in this step is very large can be judged by passing threshold, particularly, if the downlink data amount more than or equal to this threshold value, determines the downlink data amount very large.
Step 503, base station RRC starts different-frequency measure after receiving the indication of base station user's face transmission, continues to issue to UE the RRC that starts different-frequency measure and connects reconfiguration message.
In this step, this RRC connects the frequency that comprises event and alien frequencies CC in reconfiguration message.In the present embodiment, suppose that this event is event A3, event A4 or event A5.
Step 504, UE RRC receives the RRC connection reconfiguration message that base station RRC issues, and connects to reshuffle to base station RRC feedback RRC and completes message, has received RRC and has connected reconfiguration message to inform it.
Step 505, UE RRC starts different-frequency measure according to the frequency of the alien frequencies CC that RRC connection reconfiguration message in step 503 comprises, RRC is connected the alien frequencies CC that comprises in reconfiguration message to be detected, when the alien frequencies CC that satisfies the event that comprises in RRC connection reconfiguration message being detected, UE RRC is to base station RRC reporting measurement reports.
In this step, after supposing the RRC connection reconfiguration message of the startup different-frequency measure that UE RRC reception base station RRC issues, just start different-frequency measure, and do not need to use s-Measure to judge whether to carry out different-frequency measure; Therefore, the RRC connection that in step 503, base station RRC issues is reshuffled and can not carried s-Measure, and perhaps, base station RRC still carries s-Measure in the RRC connection that issues is reshuffled, but UE ignores s-Measure after receiving, and directly starts different-frequency measure.
Here, the alien frequencies CC that satisfies RRC and connect the event that comprises in reconfiguration message is called reports alien frequencies CC, described measurement report to comprise the described alien frequencies CC that reports.
Step 506, base station RRC receives the measurement report that UE sends, and reports alien frequencies CC for what this UE increased that measurement report comprises, and sends the described RRC of alien frequencies CC that reports of configuration to UE RRC and connect reconfiguration message.
Step 507 after UE RRC receives the described RRC that reports alien frequencies CC of configuration that base station RRC sends and connects reconfiguration message, configures the described alien frequencies CC that reports; And reshuffle to base station RRC feedback RRC connection and complete message, received RRC and connected reconfiguration message to inform it.
Step 508, after the RRC connection that base station RRC reception UE RRC sends was reshuffled and completed message, sending to base station user's face increased for this UE the message that has reported alien frequencies CC.
After base station user's face knows that having increased this reports alien frequencies CC, just can report at this that increases and carry out communication on alien frequencies CC.
The below is elaborated to the flow process of Fig. 6, and it comprises the following steps:
According to existing flow process of carrying out different-frequency measure, if base station RRC receives the measurement report that comprises event A2 that UE reports, start different-frequency measure.Particularly, for example can when carrying out to step 103 from step 101, just can start different-frequency measure for carry out the flow process of different-frequency measure according to Fig. 1, continue to issue to UE the RRC that starts different-frequency measure and connect reconfiguration message.
In this step, this RRC connects frequency and the s-Measure that comprises event, alien frequencies CC in reconfiguration message.In the present embodiment, suppose that this event is event A3, event A4 or event A5.
Step 603 after the RRC of the startup different-frequency measure that UE RRC reception base station RRC issues connects reconfiguration message, is judged Serving cell RSRP more than or equal to s-Measure, does not carry out different-frequency measure.
The amount of downlink data described in this step is very large can be judged by passing threshold, particularly, if the downlink data amount more than or equal to this threshold value, determines the downlink data amount very large.
Here, the alien frequencies CC that the RRC that satisfies the startup different-frequency measure that in step 601, base station RRC issues is connected the event that comprises in reconfiguration message is called and reports alien frequencies CC, described measurement report to comprise the described alien frequencies CC that reports.
Step 607 after UE RRC receives the described RRC that reports alien frequencies CC of configuration that base station RRC sends and connects reconfiguration message, configure the described alien frequencies CC that reports, and sends the message that has reported alien frequencies CC for this UE increase to UE user's face; And reshuffle to base station RRC feedback RRC connection and complete message, received RRC and connected reconfiguration message to inform it.
After UE user's face knows that having increased this reports alien frequencies CC, just can report at this that increases and carry out communication on alien frequencies CC.
The above is only preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (7)
1. the method for an adding component carrier in carrier aggregation, is characterized in that, the method comprises:
Base station wireless resource control RRC starts different-frequency measure, issues to user terminal UE RRC the RRC that starts different-frequency measure and connects reconfiguration message, and this RRC connects the frequency that comprises event and alien frequencies member carrier CC in reconfiguration message;
UE RRC starts different-frequency measure according to described frequency, when the alien frequencies CC that satisfies described event being detected, UE RRC is to base station RRC reporting measurement reports, and the described alien frequencies CC that satisfies described event is called and reports alien frequencies CC, described measurement report to comprise the described alien frequencies CC that reports;
After base station RRC receives the described measurement report of UE RRC transmission, be that this UE increases the described alien frequencies CC that reports, and connect reconfiguration message to the described RRC of alien frequencies CC that reports of UE RRC transmission configuration;
After UE RRC receives the described RRC that reports alien frequencies CC of configuration that base station RRC sends and connects reconfiguration message, configure the described alien frequencies CC that reports.
2. the method for claim 1, is characterized in that, described base station RRC starts different-frequency measure and specifically comprises:
Base station RRC just starts different-frequency measure after knowing that this UE enters the RRC connection status.
3. method as claimed in claim 2, is characterized in that, the RRC of described startup different-frequency measure connects in reconfiguration message and comprises s-Measure;
Described UE RRC starts different-frequency measure according to described frequency and specifically comprises:
After the RRC of the startup different-frequency measure that UE RRC reception base station RRC sends connects reconfiguration message, ignore s-Measure, start different-frequency measure according to described frequency.
4. method as claimed in claim 2, is characterized in that, the RRC of described startup different-frequency measure connects in reconfiguration message and do not comprise s-Measure.
5. method according to claim 1, described base station RRC starts different-frequency measure and specifically comprises:
Base station RRC receives the measurement report that comprises event A1 that UE reports, and judges not start different-frequency measure;
The base station user detects in the face of the downlink data amount, when monitoring the downlink data amount more than or equal to threshold value, sends indication to base station RRC;
Base station RRC starts different-frequency measure after receiving the indication of base station user's face transmission.
6. method according to claim 1, comprise s-Measure in the RRC connection reconfiguration message of described startup different-frequency measure, and described UE RRC starts different-frequency measure according to described frequency and comprises:
After the RRC of the startup different-frequency measure that UE RRC reception base station RRC issues connects reconfiguration message, judge Serving cell Reference Signal Received Power RSRP more than or equal to s-Measure, do not carry out different-frequency measure;
UE user detects in the face of the downlink data amount, when monitoring the downlink data amount more than or equal to threshold value constantly, sends indication to UE RRC;
UE RRC ignores s-Measure after receiving the indication of UE user's face transmission, starts different-frequency measure according to described frequency.
7. the described method of any one according to claim 1 to 6, it is at least one in event A3, event A4 and event A5 that the RRC that starts different-frequency measure connects event that reconfiguration message comprises.
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| WO2012040912A1 (en) * | 2010-09-28 | 2012-04-05 | 中兴通讯股份有限公司 | Method and system for carrier measurement |
| CN102547954B (en) * | 2010-12-31 | 2016-06-15 | 中兴通讯股份有限公司 | Report method, base station and the terminal of secondary power rollback value |
| CN103067926A (en) * | 2011-10-24 | 2013-04-24 | 中兴通讯股份有限公司 | Method and system capable of achieving resource reassortment |
| JP2016506188A (en) * | 2013-01-04 | 2016-02-25 | 富士通株式会社 | Channel measurement method, channel measurement configuration method and apparatus |
| CN106888470B (en) * | 2015-12-16 | 2020-02-18 | 润建股份有限公司 | Method and device for performing channel measurement by wireless network |
| CN109151877A (en) * | 2017-06-27 | 2019-01-04 | 大唐移动通信设备有限公司 | The configuration method and device of secondary carrier in a kind of polymerization of carrier wave |
| CN110740471B (en) * | 2017-09-28 | 2020-12-08 | 华为技术有限公司 | Communication method, device and system and computer readable storage medium |
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| Evolved Universal Terrestrial Radio Access (E-UTRA) |
| Protocol specification.《ETSI TS 136 331 V8.5.0》.2009, |
| Radio Resource Control (RRC) |
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| Publication number | Publication date |
|---|---|
| CN101827369A (en) | 2010-09-08 |
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