CN102948214A

CN102948214A - Handover with carrier aggregation

Info

Publication number: CN102948214A
Application number: CN2011800236485A
Authority: CN
Inventors: G.J.范利肖特; H.范德维尔德
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2010-05-11
Filing date: 2011-04-27
Publication date: 2013-02-27
Anticipated expiration: 2031-04-27
Also published as: KR101783289B1; KR20130094707A; JP2013526794A; EP2569979A4; AU2011251152A1; CN102948214B; AU2011251152B2; CA2798930A1; CA2798930C; RU2576385C2; WO2011142544A3; RU2012147810A; EP2569979A2; WO2011142544A2

Abstract

A handover with carrier aggregation is provided. A method of assisting handover of a user equipment from a source wireless access node to a target wireless access node, for use in a wireless access network having a plurality of carrier frequencies and a plurality of cells in which a cell and a carrier frequency may be configured as a component carrier, and in which at least two component carriers may be aggregated for communication between the user equipment and the source wireless access node, the aggregated component carriers comprising a primary component carrier and at least one secondary component carrier comprises the step of selecting, at the source wireless access node, a first carrier frequency to be configured as a primary component carrier for communication with the target wireless access node after handover, and selecting, at the target wireless access node, a second carrier frequency to be configured as a secondary component carrier for communication with the target wireless access node after handover.

Description

Utilize the switching of carrier aggregation

Technical field

The present invention relates generally to wireless network, specifically, relate to for the system at the wireless network that adopts carrier aggregation and assist the method and apparatus that switches.

Background technology

Experienced fast development by the radio access technologies in some generations such as the subscriber equipment (UE) of mobile handset via the wireless network of communicating by letter to the Radio Link of the network of the base station that is connected to communication network or other WAP (wireless access point) therein.Use the initial deployment of system of analog-modulated by such as common use GERA(GSM Enhanced Data rates for GSM Evolution Radio Access, the GSM enhancing data rate that is used for the access of GSM evolution radio) the GSM(Global System for Mobile communications of radio access technologies, global system for mobile communications) the second generation (2G) digital system replaces, and these systems itself are by such as using UTRA(UniversalTerrestrial Radio Access, universal terrestrial radio access) third generation (3G) the digital system UMTS(Universal Mobile Telecommunications System of radio access technologies, Universal Mobile Telecommunications System) substitutes or expands.The data throughout that the data throughout that third generation standard provides provides greater than second generation standard; The UTRA of use E-UTRA(evolution) suggestion of third generation partnership projects (3GPP) Long Term Evolution (LTE) the system proposition of radio access technologies continues to keep this trend, compare with previous standard, third generation partnership projects (3GPP) Long Term Evolution (LTE) system can provide larger capacity and additional feature.The WiMax system that radio access technologies is applied to IEEE 802.16 also provides the improvement with respect to previous standard.

Summary of the invention

Technical problem

Modern wireless network, such as LTE and WiMax, the general modulation format that adopts such as OFDM (OFDM), OFDM (OFDM) is applied to one or more carrier wave and is used to provide the radio resource of distributing to the link between base station (in the 3GPP term, being eNB (E-UTRA network node B)) and one or more subscriber equipment.Usually, be used for subscriber equipment is connected to the radio resource of base station from an allocation of carriers.As a kind of enhancing, suggestion polymerization two or more carrier waves are providing more capacity, and the more flexibly distribution of radio resource.Carrier aggregation also can be adopted by the wireless system except LTE or WiMax.

In the wireless system that adopts carrier aggregation, need the method and apparatus for auxiliary switching.

Technical scheme

According to a first aspect of the invention, the method that provides a kind of assisting user equipment to switch from the source radio access node to the Target Wireless access node, the method is used in the Radio Access Network with a plurality of carrier frequencies and a plurality of residential quarters, wherein, residential quarter and carrier frequency can be configured to component carrier, and wherein at least two component carriers can be aggregated for the communication between subscriber equipment and the source radio access node, the component carrier of polymerization comprises principal component carrier wave and at least one auxiliary component carrier, and the method comprises:

Select the first carrier frequency at the source radio access node, this first carrier frequency will be configured to the principal component carrier wave of communicating by letter with the Target Wireless access node after switching; And

Select the second carrier frequency at the Target Wireless access node, this second carrier frequency will be configured to the auxiliary component carrier of communicating by letter with the Target Wireless access node after switching.

The advantage of the second carrier frequency of the auxiliary component carrier of communicating by letter with the Target Wireless access node after the Target Wireless access node is selected will to be configured to switching is: the Target Wireless access node can have about locate the information of available resource in Candidate Frequency and/or residential quarter.

Preferably, the method comprises: the principal component carrier wave of selecting residential quarter, this residential quarter to communicate by letter with the Target Wireless access node after will being configured to switching at the source radio access node.Select to be for the advantage of the residential quarter that is configured to the principal component carrier wave at the source radio node: promoted the effect that the principal component carrier wave is derived for safe key.

Preferably, the method comprises:

Auxiliary minute loading gage selecting residential quarter, this residential quarter to communicate by letter with the Target Wireless access node after will being configured to switching at the source radio access node.This has such advantage: can consider the loading of residential quarter when selecting.

Preferably, the method comprises:

Metrical information about selected residential quarter is provided from the source radio access node to the Target Wireless access node.

Preferably, the method comprises:

Metrical information about the carrier frequency that is configured to selected auxiliary component carrier is provided from the source radio access node to the Target Wireless access node.

Preferably, the tabulation of this metrical information inclusion information item, each is relevant with the combination of residential quarter and carrier frequency, and the method comprises:

Determine the signal measurement parameter for each item of information;

Described item is arranged in this tabulation in order, and described order depends on the signal measurement parameter of each.

Preferably, the method comprises:

The auxiliary component carrier of selecting residential quarter, this residential quarter to communicate by letter with the Target Wireless access node after will being configured to switching at the Target Wireless access node.

Preferably, the method comprises:

Metrical information about the residential quarter on the second carrier frequency is provided from the source radio access node to the Target Wireless access node.

According to a second aspect of the invention, provide a kind of method of measuring from the subscriber equipment report of using during having the Radio Access Network of a plurality of carrier frequencies, the method comprises:

Receive the first message at subscriber equipment, the first message comprises designator, and described designator comprises the indication to the measurement report of these Radio Access Network needs;

Depend on the measurement result about the first carrier frequency, produce at this subscriber equipment place and trigger; And

Depend on described triggering and receive the first message, send the second message of passing on described measurement report from subscriber equipment to this Radio Access Network,

Wherein, described measurement report relates to the carrier frequency except the first carrier frequency at least.

In an embodiment of the present invention, described designator indication measurement report is required to relate at least the carrier frequency except the first carrier frequency.

This has such advantage: subscriber equipment can be in response to the reception of described designator, to be suitable for the pattern operation of carrier aggregation.

Preferably, described measurement report comprises the measurement of the carrier frequency of measuring for configure user equipment.This has such advantage: can not need to carry out extra measurement.

In an embodiment of the present invention, described measurement report is got rid of one or more carrier frequency of determining may not identify best cell thereon.

This has such advantage: described measurement report can be got rid of some aspect of handoff procedure and can unwantedly measure, because they can be not are associated with indication to best cell.

Preferably, whether measured in neighbor cell at least described eliminating is based on signal.May be necessary at measuring-signal in the neighbor cell of Serving cell, to determine best cell.

In described inventive embodiment, described measurement report can be got rid of for it only from one or more carrier frequency of Serving cell measuring-signal.And only may be unsuitable for determining best cell from the carrier frequency of Serving cell measuring-signal for it.

In an embodiment of the present invention, described measurement report comprises the measurement of all carrier frequencies of measuring for configure user equipment.This has such advantage: all carrier frequencies that simple designator can indicate configure user equipment to measure all should be included in the measurement report, and need not to utilize the signal resource of listing the carrier frequency that needs.

In an embodiment of the present invention, the method is included in subscriber equipment and determines residential quarter for the selection of each carrier frequency that comprises in the described measurement report, and the residential quarter of each selection is included in the measurement report.

Preferably, the residential quarter of each selection is the best cell for each carrier frequency.This has such advantage: best cell can be instructed to this network, and it can be used when supporting to switch.

In an embodiment of the present invention, the method comprises: determine the selected residential quarter for each carrier frequency on the basis of determined measuring amount, wherein, if disposed measuring amount more than one at the subscriber equipment place for each carrier frequency, then determined measuring amount is received signal power.This has such advantage: can know which measuring amount (in general, that is, for the measurement of signal quality or signal strength signal intensity) should be used for selecting can be used as the residential quarter of the selection of best cell.

In an embodiment of the present invention, the method further comprises: the definite a plurality of selected residential quarter for carrier frequency, basis that is in determined measuring amount at this subscriber equipment, wherein, a plurality of selected residential quarters are included in the described measurement report with the order that derives from the measurement for determined measuring amount.This has such advantage, that is, this order can be indicated to this network the relatively good degree (relative merit) of selected residential quarter, and for example best cell can appear at first in this tabulation.This information can be for example useful for switching preparation.

In an embodiment of the present invention, described designator comprises desired to subscriber equipment, as to be used for described measurement is included in the carrier frequency of described measurement report indication.This has such advantage, that is, this network can be according to the content of its Location of requirement measurement report.

In an embodiment of the present invention, described designator comprises the number of residential quarter, and subscriber equipment is required the measurement about the residential quarter of described selection is included in the described measurement report, is equal to or less than the number of described residential quarter for the number of the selected residential quarter of each carrier frequency.

In an embodiment of the present invention, the first carrier frequency is not configured to for the communication between subscriber equipment and the Radio Access Network.

In an embodiment of the present invention, the method comprises: configure user equipment so that described measurement report comprises the measurement for the first amount, and does not comprise the measurement for the second amount.This has such advantage: if there are a plurality of amounts available, then subscriber equipment can be configured to only comprise the amount that needs in the measurement report.

In an embodiment of the present invention, the method comprises: utilize the existing configuration of subscriber equipment to determine that measurement report comprises to the measurement of the first amount or to the second measurement of measuring.This has such advantage: can not need signaling to come the amount that comprises in the indication measurement report.

In an embodiment of the present invention, described designator is indicated the needed measuring amount of this Radio Access Network, and from the described measurement report that subscriber equipment is sent to this Radio Access Network comprise with the first carrier frequency dependence do not comprise measurement for the second amount for the measurement of the first amount.This has such advantage: if there are a plurality of amounts available, then this network can be included in the measurement report to the amount that this subscriber equipment indication should only need this network.

In an embodiment of the present invention, the first amount relates to received signal power, and the second amount relates to received signal quality.

In an alternate embodiment of the invention, the first amount relates to received signal quality, and the second amount relates to received signal power.

In an embodiment of the present invention, the method further comprises: receive the message that comprises the indication of threshold value at subscriber equipment, and send the second message that depends on above the measurement result of this threshold value.

According to a third aspect of the invention we, provide a kind of subscriber equipment that uses in having the Radio Access Network of a plurality of carrier frequencies, this subscriber equipment is arranged to carries out following operation:

Receive the first message, the first message comprises designator, and described designator comprises the indication that this Radio Access Network is needed measurement report;

Depend on the measurement result about the first carrier frequency, generate and trigger; And

Depend on this triggering and receive the first message, send the second message of passing on the indicated measurement report of designator to this Radio Access Network,

Wherein, the indicated measurement report of designator relates to the carrier frequency except the first carrier frequency at least.

According to a forth aspect of the invention, a kind of method of auxiliary switching is provided, the method is used in the Radio Access Network with a plurality of carrier frequencies and a plurality of residential quarters, its small area and carrier frequency can be configured to component carrier, and wherein at least two component carriers can be aggregated to be used for communication, the component carrier of polymerization comprises principal component carrier wave and at least one auxiliary component carrier, and the method comprises:

Before switching user device configuration is measured and identified related measurement for being used for carrying out with first, described measurement will be compared with the amount in second carrier frequency at the adjacent carrier frequencies place of first carrier frequency in the amount at the first carrier frequency place that is configured to principal component carrier wave or auxiliary component carrier; And

According to switching and be configured to principal component carrier wave or auxiliary component carrier after switching according to second frequency,

Subscriber equipment is reconfigured for to carry out with first measures and identify related measurement, described measurement will the amount of the second carrier frequency that is configured to principal component carrier wave or auxiliary component carrier with compare in the amount at first carrier frequency place.This has such advantage: can automatically perform and reconfigure, thereby signaling requirement is minimized.

Preferably, the method comprises according to the communication from Radio Access Network, subscriber equipment is reconfigured for the measurement of carrying out in the carrier frequency except the first carrier frequency.

According to a fifth aspect of the invention, a kind of subscriber equipment is provided, this subscriber equipment is used in the Radio Access Network with a plurality of carrier frequencies and a plurality of residential quarters, its small area and carrier frequency can be configured to component carrier, and wherein at least two component carriers can be aggregated to be used for communication, the component carrier of polymerization comprises principal component carrier wave and at least one auxiliary component carrier, and the method comprises:

Before switching user device configuration is measured and identified related measurement for carrying out with first, described measurement will be compared with the amount in second carrier frequency at the adjacent carrier frequencies place of first carrier frequency in the amount at the first carrier frequency place that is configured to principal component carrier wave or auxiliary component carrier; And

Subscriber equipment is reconfigured for to carry out with first measures and identify related measurement, described measurement will the amount of the second carrier frequency that is configured to principal component carrier wave or auxiliary component carrier with compare in the amount at first carrier frequency place.

More feature and advantage of the present invention will be from behind become very clear in the description to the preferred embodiments of the present invention that provide as just example.

Technique effect

The advantage of the second carrier frequency of the auxiliary component carrier of communicating by letter with the Target Wireless access node after Target Wireless access node place selects will to be configured to switching is: the Target Wireless access node can have about locate the information of available resource in Candidate Frequency and/or residential quarter.

Description of drawings

Fig. 1 illustrates the schematic diagram that characteristics are the Radio Access Network of component carrier polymerization (component carrier aggregation);

Fig. 2 is the schematic diagram that the signaling step between transfer period is shown;

Fig. 3 illustrates measuring object and reports the schematic diagram that is configured to the link of measuring identification;

Fig. 4 is the schematic diagram that the example of measuring configuration is shown;

Fig. 5 is the schematic diagram that the example of spontaneous renewal measurement configuration afterwards is shown;

Fig. 6 is the schematic diagram that the example that disposes as the measurement of embodiments of the invention is shown;

Fig. 7 is the schematic diagram that illustrates as the example of the configuration of the measurement after the spontaneous renewal of embodiments of the invention;

Fig. 8 is the schematic diagram that the signaling in the embodiments of the invention is shown;

Fig. 9 is the schematic diagram that the signaling in the embodiments of the invention is shown;

Figure 10 is the schematic diagram that the functional block of subscriber equipment is shown; And

Figure 11 is the schematic diagram that the functional block of radio access node is shown.

Embodiment

As example, will in the situation that comprises the wireless network (wireless network) of using the E-UTRA/LTE radio access technologies that is associated with the E-UTRA network to support the radio access network (radio access network) of communicating by letter, embodiments of the invention be described now.Yet, it being understood that it only as example, and other embodiment can relate to the wireless network that uses other radio access technologies, such as IEEE 802.16 WiMax systems; Embodiment is not limited to use specific radio access technologies.

In the initial deployment of LTE system (in the released version 8/9 of LTE standard), subscriber equipment (UE) generally only on a frequency, that is, on a carrier wave, is connected to a residential quarter (cell).Development along with carrier aggregation, variation has occured in this situation, subscriber equipment can be connected to a principal component carrier wave (Primary Component Carrier, PCC) and one or more auxiliary component carrier (Secondary Component Carrier, SCC).In the time of need in LTE, switching (i.e. switching from a LTE residential quarter to another LTE residential quarter), arrange the continuation that is fit to of different component carriers.Preferably, determine whether the principal component carrier wave should change, if and should change, determine that then which node will determine which component carrier becomes new principal component carrier wave, determine to carry out what operation to auxiliary component carrier, that is to say that auxiliary component carrier should be continued to use, be released or substituted by other component carrier, and determine to carry out what operation to the measurement configuration in the configuration of subscriber equipment place when such carrier aggregation is switched.

Fig. 1 illustrates the Radio Access Network 2 that is characterised in that the component carrier polymerization.Show two radio access nodes, in general, radio access node is the eNB(EUTRAN Node B in the LTE system), that is, and the Target Wireless access node 6b that subscriber equipment 4 can switch to from source radio access node 6a that it switches and radio access node.Source eNB 6a has the coverage sector 8a of shown association and coverage sector 8b and the 8c that target eNB 6b has shown association.In each coverage sector, frequency f 1, f2 or f3 are available.The residential quarter can be corresponding to the coverage sector that uses at the characteristic frequency place.

Advantage when explaining that embodiments of the invention are applied to the system that adopts carrier aggregation will at first be described the handoff procedure of the system that does not adopt carrier aggregation, and the system that does not adopt carrier aggregation is LTE released version 8/9 system for example.Usually, in traditional system, network control is in connection mode (perhaps, or rather, be in RRC_ and connect (RRC_CONNECTED) state) the mobility of subscriber equipment, that is, network determines that subscriber equipment should keep dedicated radio link with which residential quarter (being also referred to as Serving cell).Network generally use handoff procedure with subscriber equipment from a residential quarter, that is, Serving cell moves to another residential quarter, that is, Target cell.Network generally determines residential quarter and the radio access technologies (RAT) that subscriber equipment generally should be connected to based on radio quality (radio quality), but it also can consider other factors, for example, cell load, UE capability, set up the type of the carrying of (setting up).For auxiliary this handover decisions process, network is that service frequency is measured, other E-UTRA frequency is measured (being called inter-frequency measurements) and/or the frequency that other radio access technologies uses is measured (be called between RAT and measure) usually with user device configuration.

In the LTE network, two types the switching from a LTE residential quarter to another LTE residential quarter (being to switch in the LTE) can be arranged.It is high-performance and simple process that X2 switches, but needs the direct interface between source eNB and the target eNB.Replacedly, S1 switch can provide lower a little performance and may be more complicated, but even can not use (for example, via the S1 link) when there is not direct interface in it between source eNB and target eNB yet.

To switch for the X2 that the system that does not adopt carrier aggregation is described in more detail now, if so that the shortcoming that carrier aggregation may occur is introduced in explaination.Similarly shortcoming may appear in the situation of S1 switching, so embodiments of the invention can be applied to X2 and S1 switches the two.

By describing overall X2 handoff procedure with reference to showing the Fig. 2 that switches (Intra-MME/Serving GatewayHandover) in the MME/ gateway.Specifically, the correlation step of handoff procedure is as follows.

In step 2, subscriber equipment to after testing satisfy the neighbor cell of measurement report triggering criterion source eNB send measurement report.Based on other knowledge that exists among the metrical information that provides and the source eNB, whether source eNB can determine to begin to switch is now prepared.

In step 4, if beginning to switch, prepares source eNB, then it will send handover request message to target eNB.This message is carried handover preparation information in handover preparation information message, and comprises: subscriber equipment radio access capability; Current wireless access (that is, Access Layer (access stratum), AS) configuration; Provided for radio resources management (Radio Resource Management, RRM) configuration, that is, the information that is mainly used in provided for radio resources management of only being preserved by eNB, the eNB embodiment is depended in the use of this information; The information of radio interface exchange is only preserved and do not striden to wireless access (AS) context namely, by eNB, for example, be used for carrying out the required information that rebulids of RRC connection; And Target Cell Identifier.

In step 6, if target eNB is accepted switching, its details that keeps radio resource and determine the wireless access configuration that subscriber equipment will use in Target cell then.This configuration is turned back to source eNB in handover request ACK message.This message is carried this wireless access configuration in switching command message.Switching command message is carried again the RCC connection and is reconfigured (RRCConnectionReconfiguration) message.

When being used for carrying out switching in E-UTRA, this message can comprise the wireless access configuration that will use in Target cell.That is to say that this message can comprise measures configuration, represented by δ (delta) that it is poor that δ namely compares with the configuration used in the cell-of-origin, (that is, the indication of the target eNB in measuring configuration changes).This message also can comprise: the mobility control information, it can intended target cell identity (identity) (by cell identity) and feature (frequency, bandwidth and other spectral emission information, if they from the cell-of-origin in the frequency, bandwidth used different with other spectral emission information, then be called δ); The new wireless access identity that in Target cell, use; The specific radio resource configuration in residential quarter (be common for all subscriber equipmenies); Be used to the private resource of the initial access in Target cell; And be used for the timer that restricting user equipment attempts to be connected to the duration of Target cell.

This message also can comprise: the specific radio resource configuration of subscriber equipment (that is, the dedicated radio configuration), also be represented as δ, that is and, that compares with the configuration of using in the cell-of-origin is poor; And security configuration, namely, algorithm (if different from the algorithm that uses in the cell-of-origin) and the parameter (that is, the counter about whether will use the indication of new basic key and increase progressively when switching at every turn) that affects the derivation (derivation) of wireless access safe key.

In step 7, when switched in the source, it can begin the execution phase, and this can comprise that source eNB reconfigures message with the RCC connection and is forwarded to pellucidly subscriber equipment, that is to say that it does not change the content of this message.Yet integrity protection and encryption can be carried out to this message in this source.Subscriber equipment can be attempted being connected to Target cell (step 9,10) and return RRC and connect to reconfigure and finish (RRCConnectionReconfigurationComplete) message.

Explain the traditional measurement configuration among the LTE and the switching of this configuration when switching with reference to Fig. 3.Traditionally, the LTE measurement model is comprised of three chief components, and these three chief components comprise: the first, measure identity, and it is linked to measuring object with the measurement report configuration; The second, measuring object, it can specify the set (for example, the tabulation of all residential quarters on the LTE frequency, the cell list on the UMTS frequency, GSM residential quarter/frequency, etc.) of the residential quarter of certain RAT type; The 3rd, measurement report configuration, when it can equipment for indicating user should trigger measurement report and which information subscriber equipment should comprise in this report.The measurement report configuration can should trigger in the situation that particular event occurs by order report, and particular event is event A3 for example: neighbor cell is than good certain side-play amount of current service cell; Perhaps the measurement report configuration can be indicated and can be used periodic report, and in this case, subscriber equipment is according to the order of measurement result, that is, best residential quarter is preferential, and (depending on configurable number of times) at regular intervals provides configurable number of cells.

Fig. 4 illustrates the example of traditional measurement configuration at subscriber equipment place, and it shows and a plurality of report configurations can be linked to identical object, and a report configuration can be linked to a plurality of objects.By linking intelligently the configuration of measuring object and measurement report repeatedly, signaling consumption can be minimized, and for example, will have the new measurement identity that measuring object is linked to existing report configuration now by only defining, and defines new measurement.

When switching, can limit a traditional mechanism measuring the relevant signaling of configuration and can be represented as " object transposing (object swapping) ".Change about object, it refers to if the frequency shift of Serving cell, namely, Serving cell before had been the part of object 1, and after switching, new Serving cell is the part of object 2, and then consider the measurement config update that receives in switching command before, subscriber equipment is again link spontaneously.Specifically, subscriber equipment can be measured identity with all that before pointed to old service frequency be linked to new service frequency again, and will before point to new service frequency all measure identity and again be linked to old service frequency.

The result of this process is shown in Figure 5, the measurement model of its pictorial image 2, but after the spontaneous renewal of subscriber equipment, suppose that Serving cell is corresponding to measuring object 1(frequency 1 before switching now), and after switching its corresponding to measuring object 2(frequency 2).Be noted that and utilize this object transposing, can continue (need not explicit signaling) most important measurement, that is, and ambulant measurement in the new frequency of service frequency place to service frequency.

Describe the traditional handoff procedure about the system that does not adopt carrier aggregation, will describe embodiments of the invention with respect to the system that adopts carrier aggregation now.Utilize carrier aggregation (carrieraggregation, CA), subscriber equipment can be configured with a plurality of carrier waves.Subscriber equipment can be configured to measuring in each the execution frequency in these ' service frequency '.In addition, subscriber equipment can be configured to carry out inter-frequency measurements, for example, the component carrier/side frequency of the component carrier (Component Carrier, CC)/service frequency of configuration with not configuration is compared.

For example, subscriber equipment can be configured to use following configuration: frequency f 1 is used as the principal component carrier wave, and frequency f 2 is used as auxiliary component carrier.The two carries out in frequency and measures subscriber equipment to f1 and f2, and subscriber equipment carries out inter-frequency measurements to f3, that is, the Serving cell on the f1 and the neighbor cell on the f3 are compared.

Embodiments of the invention can relate to following carrier aggregation (CA).May need to the chain of two objects fetch indication service frequency and side frequency the two.Because also there is the alternate manner of indication service frequency, therefore, in Fig. 6, use the dotted line that is used for this customized configuration of diagram.Fig. 6 illustrates the example of measuring configuration as LTE embodiments of the invention, that utilize CA.

If there is not carrier aggregation, subscriber equipment generally only on a frequency, that is, on a carrier wave, is connected to a residential quarter.Development along with carrier aggregation, variation has occured in this situation, that is, subscriber equipment can be connected to a principal component carrier wave (Primary Component Carrier, PCC) and one or more auxiliary component carrier (Secondary Component Carrier, SCC).

Embodiments of the invention can solve following problem: determine whether the principal component carrier wave should change; And if should change; Determine that then which node will determine which component carrier becomes new principal component carrier wave; Determine will carry out what operation to auxiliary component carrier, that is to say, auxiliary component carrier should be continued to use, be released, still be substituted by other component carrier; And determine when such CA-switches, will carry out what operation to the measurement configuration in the configuration of subscriber equipment place.

With respect to the system that adopts carrier aggregation, traditional non-carrier aggregation transfer sequence has some restrictions.

The first, about the subscriber equipment measurement report, in any measurement report step 2 of the transfer sequence that illustrates (above), subscriber equipment can only be reported the measurement result about the residential quarter on the object/frequency/component carrier.This may not provide decision how to process the required information of other component carrier to network.

The second, definite about Target cell and the carrier wave that after switching, uses, in the step 4 of transfer sequence shown in Figure 6 and 6, source eNB can determine Target cell, and can not provide further metrical information to target eNB.Utilize carrier aggregation, whom does not usually define/the how to confirm Target cell, who/principal component carrier wave that how to confirm is new, and who/the other auxiliary component carrier of how to confirm.

The 3rd, about the spontaneous measurement config update of being undertaken by subscriber equipment, can specify " object transposing " for the source frequency in the single-carrier operation and target frequency.

Embodiments of the invention can solve the relevant problem of these switchings of pointing out.In an embodiment of the present invention, transposing can be carried out in the configuration with a plurality of carrier waves, and some carrier waves may be continued to use when switching, and some carrier waves may be added, and some carrier waves may be removed.

About the subscriber equipment measurement report, in an embodiment of the present invention, except the measurement result about the residential quarter on the carrier wave that triggers measurement report, obtain measurement result at other LTE carrier wave and also can be configured to be included in the measurement report.

According to the first embodiment, EUTRAN can by in the report configuration of measuring, whether this subscriber equipment can comprise that the single ON/OFF designator (on/offindicator) of current all frequencies measured of this subscriber equipment comes configure user equipment.If be set up, then subscriber equipment can comprise for the frequency of each care the available measurement result of best residential quarter and this residential quarter.If have a plurality of amounts available for the residential quarter of being concerned about, then this subscriber equipment can comprise the whole of them simply.If this subscriber equipment is configured to carry out a plurality of measurements for characteristic frequency with different triggering amounts, then we are still first-selected need to measure to determine which residential quarter is best by this subscriber equipment of definition with for what.In the first embodiment, system adopts simple ON/OFF (on/off) control to determine whether measurement report should comprise other frequency.The simplest method is, fixation measuring amount in the configuration of subscriber equipment (such as, received signal power or received signal quality), for example, by in equipment code, comprising the regulation to described amount, for example, for being the different situations about measuring of frequency configuration of being concerned about, subscriber equipment is determined best residential quarter according to Reference Signal Received Power (RSRP) amount.Also can specify in this case: subscriber equipment is only reported for the measurement result of RSRP amount, be that is to say that measuring amount relates to received signal power; Rather than report that for these two amounts wherein, second amount relates to received signal quality.According to the first embodiment, subscriber equipment can provide the metrical information for current all frequencies measured of this subscriber equipment, thereby avoid subscriber equipment to carry out the additional needs of measuring, therefore have additional report, but can not have the additional measurement of execution.Best residential quarter on each frequency that additional measurement report can equipment for indicating user have been measured.If subscriber equipment is not to allowing this subscriber equipment to determine that the frequency of the strongest residential quarter on this frequency measures, then in an embodiment of the present invention, this frequency of being concerned about should not be the part of additional measurement report.For example, the measurement of the Serving cell that this is applicable to only be concerned about, such as, be called as the measurement of " event A1 type ".

Allow subscriber equipment to determine that the measurement of the strongest residential quarter on the frequency comprises following measurement, for example: first, the measurement of " A3 " type, its can be used for determining the measuring amount that whether has it on the characteristic frequency than on same frequency to the neighbor cell of what a side-play amount of measuring amount of cell-of-origin (that is, the residential quarter of configuration); The second, the measurement of event " A4 " type, whether it is used for determining existing on characteristic frequency its measuring amount to be higher than neighbor cell for the defined threshold of this component carrier configuration; The and the 3rd, the measurement of event " A5 " type, whether it can be used for determining whether the measuring amount to Serving cell (that is, the residential quarter of configuration) is lower than first threshold on characteristic frequency, determine simultaneously to exist on same frequency its measuring amount to be higher than the neighbor cell of another threshold value.

Can depend on the measurement result that relates to the measured carrier frequency of subscriber equipment, produce at this subscriber equipment place and trigger.Receive the message that comprises designator according to this triggering and from this network, the message that comprises measurement report can be sent to Radio Access Network from subscriber equipment.This measurement report can relate to except this triggering based on carrier frequency at least one carrier frequency.That is to say, be used for maybe may can being included in this measurement report for the carrier frequency of carrier aggregation, but in an embodiment of the present invention, the triggering of this report can be only based on a carrier wave in these carrier waves.

This designator can indicate this measurement report to be required to relate at least one carrier frequency except the first carrier frequency, that is to say that this designator can be indicated: can require the measurement about carrier aggregation.Generally with ground, measurement report comprises the measurement result of the carrier frequency that subscriber equipment is configured to measure, and that is to say, usually, subscriber equipment receives request about measurement report from network before, the measurement result that this measurement report will utilize subscriber equipment to be configured to measure.Measurement report may be got rid of one or more carrier frequency (in these carrier frequency, having determined to recognize best cell), and this is because may not use when supporting to switch about the information of such frequency.Whether described eliminating can based on having measured signal at least in neighbor cell, this is because if only carry out measurement in Serving cell, then might can not identify best cell.Therefore, measurement report can be got rid of for it only from one or more carrier frequency of Serving cell measuring-signal.

In certain embodiments, measurement report comprises the measurement result of all carrier frequencies that subscriber equipment is configured to measure, and this is because this is the simple scheme that realizes with minimum signaling.Subscriber equipment can be determined the residential quarter selected, such as, for the best cell of each carrier frequency that comprises in the described measurement report.This information can be useful when supporting to switch.Selected residential quarter for each carrier frequency can be determined on the basis to the measurement result of determined measuring amount (in general, received signal power or received signal quality).Amount in subscriber equipment place configuration can be used, if but disposed measuring amount more than one at the subscriber equipment place for each carrier frequency, then can use acquiescently the amount based on received signal power.This can set in advance in the subscriber equipment.

Some residential quarters of selecting for carrier frequency can be determined on the basis to the measurement of the measuring amount determined, and selected residential quarter can be included in the measurement report with the order that derives from the measurement of definite measuring amount, for example, best cell can at first be comprised.This information can be useful when supporting to switch.

In an embodiment of the present invention, designator can comprise the indication to following carrier frequency, that is, for described carrier frequency, subscriber equipment is required measurement is included in the measurement report.

Designator can comprise the indication to the number that will be included in the selected residential quarter in the measurement report, is the number of residential quarter or still less for the number of each selected residential quarter of carrier frequency.That is to say, for example, for each carrier frequency, can require measurement report to comprise the best cell of certain number.

The carrier frequency of measuring not necessarily is configured to for the communication between subscriber equipment and the Radio Access Network.For example, carrier frequency may be for the candidate who is used in the future communication.

Subscriber equipment can be configured such that described measurement report comprises the measurement result to the first amount rather than the second amount, that is to say, measurement can be for example to the measurement of received power, or the to received signal measurement of quality.This can determine that measurement report comprises to the measurement of the first amount or to the second measurement of measuring based on the existing configuration that utilizes subscriber equipment.Replacedly, designator can be indicated the needed measuring amount of Radio Access Network.

Subscriber equipment can receive the message that comprises the indication of threshold value, and sends and to comprise the message that depends on above the measurement report of the measurement result of this threshold value.

According to the second embodiment, when EUTRAN adds measurement report with user device configuration for carrying out by the designator in the message that sends to subscriber equipment, subscriber equipment provides the metrical information to the best cell of each frequency, wherein, on described each frequency, subscriber equipment is configured to carry out the measurement that allows subscriber equipment to determine the strongest residential quarter of this frequency.

The control option that the other that can be implemented as follows in an embodiment of the present invention, strengthens.In each situation, the designator that the measurement that can receive the equipment for indicating user place needs at the subscriber equipment place is disposed.

According to the 3rd embodiment, which frequency in the frequency that EUTRAN can configure user equipment be configured to measure should be included in the measurement report, that is to say which frequency can provide the additional metrical information of asking.

According to the 4th embodiment, EUTRAN can configured number N, and in this case, if frequency measurement can be used for a plurality of residential quarters, then subscriber equipment can only provide the additional metrical information for N best cell.

According to the 5th embodiment, EUTRAN can configuration amount, and in this case, if can use a plurality of amounts, then subscriber equipment only provides the amount the be concerned about part as additional metrical information.

According to the 6th embodiment, EUTRAN can configured threshold, and in this case, subscriber equipment can only provide the additional metrical information that surpasses the residential quarter of this threshold value for measurement result.

Should be noted in the discussion above that " additional measurement report " in LTE, switching situation and sight in be useful.

Consideration determines that to the carrier wave after switching in the system that does not adopt carrier aggregation, Target cell frequency and " L1 " identity generally are to be the input of the safe key of target eNB preparation to source eNB.Because eNB select target residential quarter, source, and therefore know identity (specifically " L1 " identity) and the frequency of this Target cell, so this information can freely be used for the cell-of-origin.In addition, this information also can be used for this subscriber equipment after switching, so this subscriber equipment can be carried out same safety derivation.

In order to enable similar derivation in the system that adopts carrier aggregation, source eNB preferably can know at least one residential quarter of configuration after switching, so that it can utilize the L1 identity of this residential quarter and the input that frequency derives as safe key.Subscriber equipment preferably also will be known selected residential quarter, derives so that it can be used for safe key with same input.The source eNB of malice had better not use the L1 identity/frequency that is not the residential quarter of configuration after switching, because this may be so that can handle the key derivation for the key that uses in target eNB.

Switch and preferably triggered by such fact, this fact be the subscriber equipment report than better residential quarter, the residential quarter of current configuration, itself so that source eNB determine to need to carry out to switch.In the system that does not adopt carrier aggregation, eNB starts switching than the better single measurement of Serving cell based on the reflection neighbor cell on for one in the frequency/component carrier of user device configuration, that is, eNB can utilize a frequency/component carrier as the reference of switching.In addition, eNB can be configured the solution of listing in the formerly discussion for problem 1, to obtain the additional information about all frequency/component carriers.Therefore, based on the subscriber equipment measurement report, (sensible) main carrier that gears to actual circumstances after source eNB should determine to switch rightly namely, continues to use current principal component carrier wave still to change to another principal component carrier wave.

According to embodiments of the invention, the principal component carrier wave will be any carrier wave after source eNB can determine to switch, and will use which residential quarter on this principal component carrier wave.As switching a part of preparing, source eNB is to target eNB indicating target residential quarter and selected principal component carrier wave.

Source eNB may not have the resource situation of potential switching target small area/frequency and the complete general conception of load.Determine that by source eNB which carrier wave will be configured to switch auxiliary component carrier afterwards and may be no advantage.

According to embodiments of the invention, target eNB can determine which frequency will be configured to switch auxiliary component carrier afterwards.

According to embodiments of the invention, the metrical information that source eNB can will obtain from subscriber equipment between the switching preparatory stage (as the first to the 6th embodiment that for example describes in the above) passes to target eNB.

About selecting which residential quarter at auxiliary component carrier, embodiment can adopt at least two options: first, the select target residential quarter can be come based on the metrical information of subscriber equipment report in the source, and the second, the metrical information that target can utilize source eNB to transmit is come the select target residential quarter.

The first option can be inferred source eNB need only provide metrical information about Target cell, and the second option can be inferred source eNB metrical information about a plurality of residential quarters on the frequency of being concerned about need to be provided.The latter also affects the measurement report that subscriber equipment carries out, that is, subscriber equipment also may need the second option is reported to adapt in a plurality of residential quarters.Therefore, the second option may relate to additional signaling and additional complexity, but so that can consider for example cell load when determining to use which residential quarter.The first and second options can be implemented as follows.

According to embodiments of the invention, source eNB is select target residential quarter on the frequency that the subscriber equipment except the role's that is designated as the principal component carrier wave frequency is measured also.That is to say that for the role's who is not assigned with the principal component carrier wave frequency, source eNB can the select target residential quarter.

In this case, source eNB preferably only provides metrical information about each frequency to Target cell, determines that to help target which frequency is configured to auxiliary component carrier.The measurement result that subscriber equipment provides can be transmitted in the source, and perhaps implicitly (that is, by the order of object included in the handover preparation information (frequency, cell combination), for example, best object first) provides metrical information.

In an embodiment of the present invention, source eNB can only provide obtain from subscriber equipment, for the metrical information of selected Target cell.

According to the second option, target eNB can be on the frequency that the subscriber equipment except the role's that is designated as the principal component carrier wave frequency is measured the select target residential quarter, that is to say, source eNB can provide obtain from subscriber equipment, for the metrical information of the one or more potential targets residential quarter on the frequency of being concerned about.

According to the first or second option, eNB can implicitly, that is, by with the ordering of the clauses and subclauses in the tabulation of potential target, provide metrical information.In the situation of selecting b, this order may relate to two kinds of ranks (level), that is, the first, the rank of frequency, and another, the rank of the residential quarter on the frequency.

According to embodiments of the invention, source eNB implicitly (that is, by the order of listing object (frequency, cell combination) included in the handover preparation information, for example, best object is at first appearance in tabulation) provides metrical information.

Should be noted in the discussion above that the use that can walk abreast mutually of the first and second options, that is, the residential quarter can be selected in some frequencies in the source, and target is in the upper residential quarter of selecting of other frequency (for example, subscriber equipment does not provide the frequency about its metrical information).

About the automatic measurement config update of being carried out by subscriber equipment, the principal component carrier wave may be most important component carrier for mobile management.This can find out under following hypothesis, that is, general only when the dedicated radio link on the principal component carrier wave is broken, subscriber equipment just can be carried out and rebulid.When same situation also occurs, can not taking very large action for other component carrier (auxiliary component carrier), this is because the communication on the principal component carrier wave still can continue.In order to prevent from losing the connection on the principal component carrier wave, measure if disposed in the frequency to the principal component carrier wave, then be preferably in the frequency that continues immediately after switching the principal component carrier wave and measure.Given this, according to embodiments of the invention, when having disposed a plurality of carrier wave, subscriber equipment and target eNB are preferably in to be switched and carries out the automatic object transposing when rebuliding.

According to embodiments of the invention, for measuring in the frequency, when switching and rebuliding, UE and target eNB preferably will be linked to corresponding to the principal component carrier wave before switching (namely automatically, " old master's component carrier ") any measurement identity of measuring object again be linked to measuring object corresponding to the principal component carrier wave after switching (that is, " new principal component carrier wave ").

Variation as the above embodiment of the present invention, for measuring in the frequency, when switching and rebuliding, UE and target eNB preferably automatically will be linked to any measurement identity corresponding to the object of new principal component carrier wave and again be linked to measuring object corresponding to old master's component carrier.

For inter-frequency measurements, the object transposing can be carried out in an embodiment of the present invention, that is to say, for the inter-frequency measurements on any component carrier that becomes service frequency at its side frequency, preferably carry out the object transposing, that is, measure and again be linked to previous service frequency.Preferably, if the frequency of being concerned about is changed, then can change by application, that is to say, exist and measure, compare with the component carrier (" old service ") that will serve/dispose and the component carrier that does not dispose, " old service " becomes the not component carrier of configuration, and the old not component carrier of configuration becomes the component carrier of service/configuration.

The embodiment of combination can illustrate that by the example shown in Fig. 6 the embodiment for combination generally uses following operation.

Before switching, subscriber equipment preferably is configured to use following configuration: frequency f 1 is as the principal component carrier wave, and frequency f 2 is as auxiliary component carrier; And subscriber equipment is all carried out in the frequency f1 and f2 and is measured; And subscriber equipment is carried out inter-frequency measurements to f3, that is, and and with the service of f1 and comparing of f3.

Carry out and switch, preferably produce following configuration: f3 as the principal component carrier wave, and frequency f 2 still is configured to auxiliary component carrier; Subscriber equipment is all carried out in the frequency f2 and f3 and is measured; And subscriber equipment is carried out inter-frequency measurements to f1, that is, and and with the service on the f3 and upper adjacent the comparing of f1.

In this case, can carry out as follows object transposing: according to embodiment 3.2 and 3.3, to f1(old master component carrier) frequency in measure again be linked to the new principal component carrier wave of f3(); And the service on the f1 and the upper adjacent inter-frequency measurements that compares of f3 are linked again, so that it can be with the upper service of f3 and upper adjacent the comparing of f1.

Fig. 7 is illustrated in the exemplary L TE measurement configuration that the object transposing has CA afterwards.

It may be favourable that restriction is further carried out automatic renewal by subscriber equipment, namely, can specify and other auxiliary component carrier or relevant again the linking of other carrier wave, that is to say that subscriber equipment and target eNB preferably do not automatically perform the again link except the again link that previous embodiment covers.EUTRAN preferably uses explicit signaling and carries out for any of these frequency/carrier waves and reconfigure.

Fig. 8 is provided at the general view of the embodiment of the message when measuring configuration and measurement report subsequently.Should be noted in the discussion above that this is for illustration purpose, and other embodiment are possible, so embodiment is not limited to the illustrated particular message of Fig. 8.

With reference to figure 8, in step 1, source eNB preferably reconfigures user device configuration for the RRCConnectionReconfiguration(RRC that comprises field measconfig by transmission connects) message carries out measurement report.

Embodiments of the invention comprise the part of the clauses and subclauses of following reportConfigToAddModList.

First, reportAdditionalFreqInfo(report additional frequency information): it has such field, whether this field equipment for indicating user can provide the additional metrical information of all frequencies that subscriber equipment is configured to measure, as shown in the first or second embodiment; Perhaps have such field, this field is indicated which frequency in the frequency that is configured to measure for subscriber equipment, and subscriber equipment can provide additional metrical information, as shown in the 3rd embodiment.

The additional largest cell of the second, reportAdditionalMaxCells(report): if be included, then subscriber equipment can utilize indicated N the best cell of limits value N report of this field.If be not included, then subscriber equipment can only be reported best cell.

The 3rd, reportAdditionalQuant(reports additional amount): if if be included and subscriber equipment has the measurement result that can be used for more than one amount, then this subscriber equipment can only be reported the result for the indicated amount of this field.

The 4th, reportAdditionalThresh(reports additional threshold): if be included, then subscriber equipment can only provide the additional metrical information that surpasses the residential quarter of the indicated threshold value of field for its measurement result.

In the step 2 of Fig. 8, when satisfying when having disposed the trigger condition of measurement of additional measurement report for it, subscriber equipment can send MeasurementReport (measurement report) message that comprises additional information.

The field of measurement report can comprise that additionalmeasinfo(adds metrical information): subscriber equipment can comprise the measurement result of list of frequency, wherein, optimum frequency is arranged in first, and for each frequency, subscriber equipment can comprise the measurement result of one or more residential quarters, wherein, optimum frequency is arranged in first.For each residential quarter, subscriber equipment can not comprise any content (that is, and when not need to except this order metrical information the time), perhaps can comprise the available measurement result for one or more amounts.

The general view of the message when Fig. 9 provides switching in the embodiments of the invention.Should be noted in the discussion above that the message that illustrates is in order to illustrate, and embodiments of the invention are not limited to use shown message.

In step 1, source eNB preferably starts handoff procedure by sending handover request message to target eNB.This message preferably includes handover preparation information message, and it is expanded in REL-10, uses for the continuation of the subscriber equipment that is configured to have CA to support a plurality of component carriers.

Source eNB determines that preferably that frequency is configured to the principal component carrier wave, and the Target cell on this frequency.

For other frequency, source eNB is indicating target residential quarter or metrical information for the best cell on this frequency is provided preferably.Provide measurement result for each frequency, wherein optimum frequency (that is, sorting according to the best cell on the frequency) is listed in first.

Which frequency is field in the first step of Fig. 9 preferably indicate be used as the principal component carrier wave, and the Target cell on this frequency.This indication can be provided by existing field, the Target cell ID(ECGI that existing field is for example used in the EUTRAN signaling);

Field " otherCC-Info " can comprise Target cell according to the first option above-mentioned, that is to say that it provides some frequencies.Specifically, it can provide the Target cell identity, and the metrical information for this Target cell can be provided, and this can implicitly carry out, that is, by the order that these frequencies are listed, that is, optimum target is listed in first.

Replacedly, according to aforesaid option 2, field " otherCC info " can not comprise Target cell.It can provide some frequencies.This field provides the metrical information for one or more potential Target cells, and this can implicitly carry out, that is, by the order that these frequencies are listed, that is, optimum target is listed in first.

When receiving handover request message, target eNB is preferably carried out access control (admissioncontrol), reserves resource at Target cell, and prepares RRCConnectionReconfiguration (the RRC connection reconfigures) message.Target eNB is included in RRCConnectionReconfiguration message in the handover request ACK message, and this handover request ACK message turns back to source eNB in the step 2 of Fig. 9.

According to embodiments of the invention, target eNB is configured to the principal component carrier wave with the frequency (and corresponding residential quarter) of source indication.Target eNB considers which frequency is the information that source eNB provides decide be configured to auxiliary component carrier.

Target eNB can correspondingly be prepared RRCConnectionReconfiguration message, and it is transmitted to source eNB, and source eNB is transmitted to subscriber equipment with it again.When receiving RRCConnectionReconfiguration message, subscriber equipment can start switching to indicated Target cell at principal component carrier wave and auxiliary component carrier.As the part of this process, subscriber equipment can be carried out and reconfigures according to be included in field in the RRCConnectionReconfiguration message by target eNB.Preferably, if subscriber equipment has successfully been finished random access procedure on the principal component carrier wave, then this switching is regarded as successfully.

When successfully having set up with being connected of Target cell, subscriber equipment preferably send RRCConnectionreconfigurationcomplete(RRC connect to reconfigure finish) message.

Figure 10 illustrates the high level model of subscriber equipment.The according to an embodiment of the invention operation of functional block is below described briefly.General control can be controlled layer 3 agreement,, receives, processes and prepare and send radio resource control (RRC) message that is.Measuring unit can be carried out the measurement by the EUTRAN configuration.Safe unit can be carried out the integrity protection to signaling radio bearer (Signalling Radio Bearer, SRB), to the encryption of all radio bearers (Radio Bearer, RB), and the derivation of the key that is associated.The radio access unit can be controlled layer 1 and the layer 2 of radio access protocol.

Specifically, in an embodiment of the present invention, functional block can operate as follows.The reception of the newer field in the reportConfigToAddModList can be controlled in the master control unit, and measuring unit can be configured to report additional metrical information.Measuring unit can be according to making a response to the information of general control unit report.In the situation that has disposed additional measurement report, measuring unit can be included in the metrical information about additional frequency in the report that offers the master control unit.

Figure 11 illustrates the high level model of eNB.Following content is described the impact which functional block at least can be subject to embodiments of the invention briefly: the subscriber equipment control can be controlled the radio access protocol of layer 3,, receives, processes and prepare and send radio resource control (RRC) message that is; The network interface control can be controlled the identity function of network interface; Measure control and can control the configuration of the measurement function among subscriber equipment and the eNB; Safe control can be controlled the configuration of the safety function (that is, integrity protection and encryption) of radio access; And the radio resource control can be controlled the configuration of layer 1 and the layer 2 of radio access protocol.

Embodiments of the invention can affect some functional blocks of eNB as follows.The subscriber equipment control unit can be controlled the transmission of the newer field in the reportConfigToAddModList, and the reception of additional metrical information in MeasurementReport (message report) message, and related mutual with measure-controlling unit and mobility control unit.The network interface control can be controlled the HandoverPreparationInformation(handover preparation information) transmission (source) of newer field in the message and the reception (target side) of these fields and with mobility control unit related mutual (for example, target side: determine which auxiliary component carrier of configuration) with related mutual (for example, the target side: the object transposing) of measure-controlling unit.About mobility control unit, source can determine the principal component carrier wave and select target residential quarter on the frequency of being concerned about.In addition, additional information about other component carrier (Target cell, metrical information, may implicitly provide) is provided in the source.Target side determines which frequency is configured to auxiliary component carrier (and may use which residential quarter in these frequencies).Target side is also checked be successfully completed (successfully having set up the principal component carrier wave) of switching.About measure-controlling unit, when source can determine subscriber equipment as additional metrical information is provided.In addition, target eNB is carried out the transposing of measuring configuration.

Embodiments of the invention can relate to switching, and as shown in the message sequence chart of Fig. 9, but embodiments of the invention also can be used when connection rebulids.Switching before connection rebulids is prepared and is prepared similar for the switching of switching.That is to say that with respect to principal component carrier wave and auxiliary component carrier, the information that offers target from the source is identical.Subscriber equipment can be in any residential quarter under the same target eNB (that is, comprising the residential quarter on the frequency that is not chosen as the principal component carrier wave by source eNB) upward starts described rebuliding.Yet, can suppose that and be connected when setting up similarly, target only rebulids radio communication at single-frequency.The frequency of being concerned about can be regarded as the principal component carrier wave.In this case, by temporary suspension, and all relevant configuration sections are held to the measurement of other component carrier and radio resource configuration, and as first follow-up basis that reconfigures the increment (delta) in the message.The measuring object transposing similar to the measuring object transposing of carrying out when switching also carried out when rebuliding.These also cause the measurement configuration for the renewal of the component carrier of " hang-up ".

Embodiments of the invention can have one or more following advantage.First, subscriber equipment is comprised for the selection of the metrical information of the frequency except the frequency that triggers report introduced the general fashion of supporting various mobility sights, and need not introduce any specific detail, and for example, for the optimized different triggering criterion of specific deployments situation.Additional measurement report is so that can continue immediately to use a plurality of/optimal component carrier after switching.The control that strengthens can be introduced into the information that further adjusting/optimizing user equipment provides, for example, and to the indication of the number of frequency, residential quarter, report, minimum threshold.

The second, can specify the mechanism that keeps existing switching and security doctrine.About as the principal component carrier wave of basic frequency/residential quarter (corresponding with particular network node, and definition is used to the input that safe key is derived), it is determined by the source, and auxiliary component carrier is regarded as additional radio resources and is therefore determined by target eNB.Cover different signaling options, for example, implicitly the metrical information signaling is sent by the order in tabulating.

The 3rd, embodiments of the invention can be specified the mechanism that covers carrier aggregation.Main aspect is to be continued measuring in the frequency of principal component carrier wave, that is, these measurements are considered to be most important, because the frequency of being concerned about plays main effect in communication.For all component carriers, can advise similar object transposing, to be used for non-carrier aggregation system.Keep dedicated radio link unimportant, but can help to reduce signaling consumption.

In an embodiment of the present invention, source eNB 6a can select the Target cell on each frequency, and determines that frequency becomes the principal component carrier wave.Target eNB 6b can determine which frequency is configured to auxiliary component carrier.Source eNB 6a can provide metrical information for a plurality of frequencies to target eNB 6b, and target eNB 6b can use this metrical information when determining which frequency is configured to auxiliary component carrier.This network that is to say EUTRAN, subscriber equipment 4 can be configured to comprise the measurement result for the measured frequency except the frequency that triggers the transmission of reporting, that is, and and additional frequency result.Subscriber equipment 4 and target eNB 6b change with respect to the link of measuring object and measure configuration, to promote to come with minimum signaling the continuation of the measurement on the frequency that is assigned to the principal component carrier wave, namely, subscriber equipment can be changed the object of previous principal component carrier wave and the object of new principal component carrier wave, and the link of other object constant (that is, EUTRAN uses and shows signaling).Above content is come configuration UE so that EUTRAN can be used in the afterwards immediately suitable set of applicable principal component carrier wave and auxiliary component carrier of switching.

Above embodiment will be understood to be illustrated examples of the present invention.Be appreciated that, any feature that related any one embodiment describes can be used separately, or be used in combination with described further feature, and also can use with one or more Feature Combinations of any other embodiment, perhaps use with any combination of any other embodiment combinedly.In addition, the equivalent and the modification that more than do not have to describe also can be adopted, and can not break away from the scope of the present invention that defines in the claims.

Claims

1. method that assisting user equipment switches from the source radio access node to the Target Wireless access node, described method is used in the Radio Access Network with a plurality of carrier frequencies and a plurality of residential quarters, its small area and carrier frequency can be configured to component carrier, and wherein at least two component carriers can be aggregated for the communication between subscriber equipment and the source radio access node, the component carrier of polymerization comprises principal component carrier wave and at least one auxiliary component carrier, and described method comprises:

Select the first carrier frequency at the source radio access node, described first carrier frequency will be configured to the principal component carrier wave of communicating by letter with the Target Wireless access node after switching; And

Select the second carrier frequency at the Target Wireless access node, described the second carrier frequency will be configured to the auxiliary component carrier of communicating by letter with the Target Wireless access node after switching.

2. method according to claim 1, described method comprises:

The principal component carrier wave of selecting residential quarter, described residential quarter to communicate by letter with the Target Wireless access node after will being configured to switching at the source radio access node.

3. method according to claim 1 and 2, described method comprises:

The auxiliary component carrier of selecting residential quarter, described residential quarter to communicate by letter with the Target Wireless access node after will being configured to switching at the source radio access node.

4. method according to claim 3, described method comprises:

5. the described method of any one according to claim 1-4, described method comprises:

6. according to claim 4 or 5 described methods, wherein, the tabulation of described metrical information inclusion information item, each is relevant with the combination of residential quarter and carrier frequency, and described method comprises:

Determine the signal measurement parameter for each item of information; And

Described item is arranged in the tabulation in order, and described order depends on the described signal measurement parameter of each.

7. method according to claim 1, described method comprises:

Selecting the residential quarter at the Target Wireless access node, communicates by letter with the Target Wireless access node in described residential quarter, is configured to the auxiliary component carrier after switching.

8. method according to claim 7, described method comprises:

9. method of measuring from the report of the subscriber equipment that during having the Radio Access Network of a plurality of carrier frequencies, uses, described method comprises:

Receive the first message at subscriber equipment, described the first message comprises designator, and described designator comprises the indication to the measurement report of described Radio Access Network needs;

Depend on the measurement result about the first carrier frequency, produce at described subscriber equipment place and trigger; And

Depend on described triggering and receive the first message, send the second message of passing on described measurement report from subscriber equipment to described Radio Access Network,

Wherein, described measurement report relates at least one carrier frequency except described first carrier frequency.

10. method according to claim 9, wherein, described designator indication measurement report is required to relate at least one carrier frequency except described first carrier frequency.

11. according to claim 9 or 10 described methods, wherein, measurement report comprises the measurement of the carrier frequency that described subscriber equipment is configured to measure.

12. any one described method in 11 according to claim 9, wherein, described measurement report is got rid of one or more carrier frequencies of having determined to identify best cell at its place.

13. any one described method in 11 according to claim 9, wherein, described measurement report is got rid of one or more carrier frequencies of having determined to identify best cell at its place.

14. according to claim 12 or 13 described methods, wherein, whether described eliminating is measured in neighbor cell at least based on signal.

15. any one described method in 14 according to claim 12, wherein, described measurement report is got rid of for it only from one or more carrier frequencies of Serving cell measuring-signal.

16. any one described method in 11 according to claim 9, wherein, described measurement report comprises the measurement of all carrier frequencies that are configured to measure for described subscriber equipment.

17. any one described method in 16 according to claim 9, described method comprises:

Determine the residential quarter of selecting for each carrier frequency that comprises in the described measurement report at the subscriber equipment place; And

The residential quarter of each selection is included in the described measurement report.

18. method according to claim 17, wherein, the residential quarter of each selection is the best cell for each carrier frequency.

19. according to claim 17 or 18 described methods, described method comprises:

On the basis that the measuring amount of determining is measured, definite residential quarter of selecting for each carrier frequency at described subscriber equipment place,

Wherein, if for each carrier frequency, disposed the measuring amount more than at described subscriber equipment place, then determined measuring amount is received signal power.

20. method according to claim 19, described method further comprises:

On the basis that the measuring amount of determining is measured, definite a plurality of selected residential quarter for carrier frequency at described subscriber equipment place,

Wherein, a plurality of selected residential quarters are included in the described measurement report with the order that derives from the measurement for determined measuring amount.

21. any one described method in 20 according to claim 9, wherein, described designator comprises the indication that subscriber equipment is required described measurement is included in the carrier frequency in the described measurement report.

22. any one described method in 21 according to claim 9, wherein, described designator comprises the number of residential quarter, and subscriber equipment is required the described measurement about the residential quarter of described selection is included in the described measurement report, is equal to or less than the number of described residential quarter for the number of the selected residential quarter of each carrier frequency.

23. any one described method in 22 according to claim 9, wherein, the first carrier frequency is not configured to for the communication between described subscriber equipment and the described Radio Access Network.

24. any one described method in 23 according to claim 9, described method comprise user device configuration for not comprising measurement for the second amount so that described measurement report comprises measurement for the first amount.

25. comprising the existence of user's equipment, any one described method in 23 according to claim 9, described method dispose to determine that described measurement report comprises for the measurement of the first amount or for the measurement of the second amount.

26. any one described method in 23 according to claim 9, wherein:

The needed measuring amount of described designator indication Radio Access Network; And

The described measurement report that is sent to Radio Access Network from subscriber equipment comprises the measurement for the first amount, and do not comprise for the measurement of the second amount of first carrier frequency dependence.

27. any one described method in 26 according to claim 24, wherein, described the first amount relates to received signal power, and described the second amount relates to received signal quality.

28. according to claim 24 or 26 described methods, wherein, described the first amount relates to received signal quality, and described the second amount relates to received signal power.

29. any one described method in 28 according to claim 9, wherein, described method further comprises:

Receive the message that comprises the indication of threshold value at described subscriber equipment place;

Depend on the measurement result that surpasses described threshold value and send the second message.

30. being arranged to, a subscriber equipment that uses, described subscriber equipment carry out following operation in having the Radio Access Network of a plurality of carrier frequencies:

Receive the first message, described the first message comprises designator, and described designator comprises the indication to the measurement report of described Radio Access Network needs;

The measurement result that depends on about the first carrier frequency generates triggering; And

Depend on this triggering and receive the first message, send the second message of passing on the indicated measurement report of designator to described Radio Access Network,

Wherein, the indicated measurement report of described designator relates to the carrier frequency except described first carrier frequency at least.

31. auxiliary method of switching, described method is used in the Radio Access Network with a plurality of carrier frequencies and a plurality of residential quarters, its small area and carrier frequency can be configured to component carrier, and wherein at least two component carriers can be aggregated to be used for communication, the component carrier of polymerization comprises principal component carrier wave and at least one auxiliary component carrier, and described method comprises:

Before switching user device configuration is measured and identified related measurement for carrying out with first, described measurement will be compared with the amount in second carrier frequency at the side frequency place of described first carrier frequency in the amount at the first carrier frequency place that is configured to principal component carrier wave or auxiliary component carrier; And

Be configured to switch principal component carrier wave or auxiliary component carrier afterwards according to switching and according to second frequency,

32. method according to claim 31, described method comprise according to the communication from Radio Access Network, subscriber equipment are reconfigured for the measurement of carrying out in the carrier frequency except the first carrier frequency.

33. subscriber equipment, described subscriber equipment is used in the Radio Access Network with a plurality of carrier frequencies and a plurality of residential quarters, its small area and carrier frequency can be configured to component carrier, and wherein at least two component carriers can be aggregated to be used for communication, the component carrier of polymerization comprises principal component carrier wave and at least one auxiliary component carrier, and method comprises:

Before switching described user device configuration is measured and identified related measurement for carrying out with first, described measurement will be compared with the amount in second carrier frequency at the adjacent carrier frequencies place of described first carrier frequency in the amount at the first carrier frequency place that is configured to principal component carrier wave or auxiliary component carrier; And

Described subscriber equipment is reconfigured for to carry out with first measures and identify related measurement, described measurement will the amount of the second carrier frequency that is configured to principal component carrier wave or auxiliary component carrier with compare in the amount at first carrier frequency place.