CN102378242A - Method and device for generating optimal cell list during carrier aggregation switching - Google Patents
Method and device for generating optimal cell list during carrier aggregation switching Download PDFInfo
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Abstract
The invention discloses a method for generating an optimal cell list during carrier aggregation switching. The method comprises the following steps that: a source base station generates the optimal cell list according to a measurement report received within a preset time period; or the source base station generates the optimal cell list according to the received measurement report, wherein the optimal cell list carries time information. The invention also discloses a device for generating the optimal cell list during carrier aggregation switching. By the invention, the optimal cell list transmitted from the source base station to a target base station has more important reference significance; therefore, the target base station can more accurately determine a target secondary cell (Scell) to be switched by user equipment (UE); and unnecessary Scell deleting and adding operations can be avoided effectively.
Description
Technical field
The present invention relates to the hand-off process technology in the carrier aggregation of digital mobile communication field, relate in particular to the method and the device that generate the optimum subdistrict tabulation in a kind of carrier aggregation handoff procedure.
Background technology
In GSM; In order to guarantee quality of service; Give the good business experience of user, when subscriber equipment (UE) after certain sub-district and network connect, UE still need measure the signal quality of Serving cell and neighbor cell; Select proper cell to switch, so that satisfy the mobility requirement.In Long Term Evolution (LTE, the Long Term Evolution) system, the handoff procedure of X2 interface is shown in Fig. 1 a; Source base station is to the UE sending measuring control information that is in connected state, and UE carries out corresponding measurement and reporting measurement reports, the measurement report that source base station reports according to UE; In conjunction with actual conditions, the select target sub-district, and send handoff request message to the target BS of selected Target cell ownership; Carry ability information, AS layer configuration information, RRM configuration information and the contextual information of UE, target BS carries out resource reservation etc. to be handled the back and responds handover request ack message to source base station, and carries the switching command information that sends to UE; This switching command packets of information contains the finally selected Target cell of target cell information target BS; The final Target cell of selecting of target BS can be different with the selected Target cell of above-mentioned source base station, and source base station is with said switching command information, i.e. RRC reprovision; Be transmitted to UE; After the finally selected Target cell of said Target cell inserted at random and accomplishes, UE sent to switch to target BS and accomplishes order, and the RCC reprovision is accomplished.Wherein, similar through handoff procedure and said process that the S1 interface is accomplished, just handoff procedure is transmitted through mobile management entity (MME, Mobility Management Entity), rather than passes through source base station.
It is that the main foundation of select target sub-district is the measurement report that UE reports that above-mentioned source base station carries out handover decisions.In the LTE system under the connected state of UE; The detailed process of above-mentioned measurement is: the network side base station sends to UE with measurement control message; Comprise other association attributeses of measuring sign (MID), measuring object (MO), report configuration (RC) and measuring in this measurement control message; UE goes execution to measure and assessment according to the measuring object in the measurement control message, report configuration, and measures and assess resulting measurement result generation measurement report according to carrying out, and reports the network side base station; Afterwards, the measurement report that the network side base station reports according to UE carries out switch decision, the Target cell of selecting UE to switch.Wherein, MID gets up to form a complete measuring task with measuring object and report configuration association, and MO has comprised the measuring object attribute; Like carrier frequency, Neighboring Cell List etc., each carrier frequency only can dispose a MO; RC has comprised the report configuration attribute; Like Event triggered or periodic report, the event definition of triggering such as incident A1, incident A2 ..., report number of times etc.
Among the LTE; Mobility parameter in the time of can consulting UE between the base station and switch, that some are crucial, detailed process are shown in Fig. 1 b, and base station 2 is given through sending moving parameter adjustment request message (MOBLITYCHANGE REQUEST) in base station 1; If this adjustment is adopted in base station 2; Respond moving parameter adjustment response message (MOBILITY CHANGE ACKNOWLEDGE) to base station 1, otherwise, do not respond MOBILITY CHANGE ACKNOWLEDGE to base station 1.
For higher data rate is provided to the mobile subscriber; Advanced long-term evolution system (LTE-A; Long TermEvolution Advance) carrier aggregation technology (CA has been proposed; Carrier Aggregation), its objective is, improve the peak rate of UE to the UE with respective capabilities provides bigger broadband.Among the LTE, the maximum downstream transmission bandwidth of system's support is 20MHz, and carrier aggregation is that two perhaps more component carrier (CC, Component Carriers) polymerizations are got up to support to be no more than greater than 20MHz, maximum the transmission bandwidth of 100MHz.Have the UE carrier aggregation ability, LTE-A, transceive data on a plurality of CC simultaneously, the UE that below relates to is this type of UE except specifying.In the LTE-A system, UE can pass through a plurality of CC after getting into connected state simultaneously, communicates like CC1, CC2 and base station; The base station can or be decided to be UE approximately according to agreement through explicit configuration and specify a principal component carrier wave (PCC, PrimaryComponent Carrier), and other component carrier is called auxilliary component carrier (SCC; SecondaryComponent Carrier); Be called main Serving cell (Pcell, Primary Cell) at descending (DL, Down Link) last Serving cell of PCC; Serving cell on DL SCC is called auxilliary Serving cell (Scell, Secondary Cell).
Handoff procedure among the LTE-A is identical with handoff procedure among the LTE; Be specially: source base station is to the UE sending measuring control information that is in connected state, and UE carries out and measures and reporting measurement reports the measurement report that source base station reports according to UE; Switch in conjunction with the actual conditions decision; Select target master Serving cell to the target BS transmission handoff request message of target master Serving cell ownership, carries ability information, AS layer configuration information, RRM configuration information and the contextual information of UE; Target BS carries out resource reservation etc. to be handled the back and responds handover request ack message to source base station; Carry the switching command information to UE, it is the finally selected target master's service cell information of said UE that switching command information comprises target BS, and can also comprise target BS is the information of the selected one or more auxilliary Serving cells of said UE; The switching command information that source base station is transmitted target BS is forwarded to UE; UE is according to this switching command information, and after the finally selected target master's Serving cell of target BS inserted at random and accomplishes, UE sent to switch to target BS and accomplishes order.
In said process, dispose one or more auxilliary Serving cells in order to cooperate target BS, source base station also need comprise an optimum subdistrict tabulation in the handoff request message that target BS sends.At first, source base station is according to the measurement report of at present available UE, and measurement report carries UE and reports self main Serving cell and signal quality of auxilliary Serving cell at that time; With each sub-district according to its signal quality descending; Be that optimum subdistrict is arranged in the foremost, source base station is in available measurement report, according to the result who is arranged; At least therefrom select an optimum subdistrict to each frequency, generate the optimum subdistrict tabulation.Target BS can be according to the Pcell of above-mentioned optimum subdistrict tabulation for said UE configuration Scell or said UE, and the Scell of actual disposition also can not be the sub-district in the above-mentioned optimum subdistrict tabulation certainly.
When above-mentioned source base station generates the optimum subdistrict tabulation, do not specify for available measurement report is concrete, so; Source base station might all be thought available measurement report with the measurement report of all preservations, and wherein, calling time between the measurement report, be separated by may be very long; What have reports comparison early, and what have reports time ratio later, and in practical application; These measurement reports do not have does not have comparativity; Like this, will make that the optimum subdistrict tabulation of final generation is little to the reference significance of target BS, even can mislead the decision-making of target BS.
Summary of the invention
In view of this; Main purpose of the present invention is to provide method and the device that generates the optimum subdistrict tabulation in a kind of carrier aggregation handoff procedure; To solve when source base station generates the optimum subdistrict tabulation; Fail clear and definite available measurement report, and fail the problems such as time of reception of clear and definite measurement report in the optimum subdistrict that the is generated tabulation.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides the method that generates the optimum subdistrict tabulation in a kind of carrier aggregation handoff procedure; Said method comprises: source base station is according to the measurement report that receives in the preassigned time; Sorted according to signal quality order from high to low in each sub-district, generate the optimum subdistrict tabulation.
In such scheme, when the said preassigned time is used to represent to receive said measurement report and generate the threshold value of time difference between the said optimum subdistrict tabulation, through consulting to specify in advance between agreement regulation or base station.
In such scheme; Comprise the current signal quality class information in each sub-district in the said optimum subdistrict tabulation, said signal quality class information obtains according to sub-district current signal quality parameter value and predefined one or more signal quality parameter threshold value.
In such scheme; In the preassigned time; When said source base station receives a plurality of measurement report corresponding to same frequency; In received a plurality of measurement reports,, generate said optimum subdistrict tabulation according to minimum measurement report of time difference between the moment that receives and the current time corresponding to same frequency.
In such scheme, said source base station sorts each sub-district according to signal quality order from high to low, comprising: said source base station sorts each sub-district according to RSRP value or RSRQ value order from high to low.
In such scheme, when said source base station sorts the tabulation of generation optimum subdistrict with each sub-district according to the RSRP value, in said optimum subdistrict tabulation, carry the sequence number that sorts according to the RSRQ value from high to low in each sub-district; Or, when said source base station sorts the tabulation of generation optimum subdistrict with each sub-district according to the RSRQ value, in said optimum subdistrict tabulation, carry the sequence number that sorts according to the RSRP value from high to low in each sub-district.
The present invention also provides the method that generates the optimum subdistrict tabulation in a kind of carrier aggregation handoff procedure; Said method comprises: source base station is according to the measurement report that receives; Sorted according to signal quality order from high to low in each sub-district; Generation optimum subdistrict tabulation, and in this optimum subdistrict tabulation, carry be used to indicate receive said measurement report with generate said optimum subdistrict tabulate between the temporal information of time difference.
In such scheme, said source base station sorts each sub-district according to signal quality order from high to low, comprising: said source base station sorts each sub-district according to RSRP value or RSRQ value order from high to low.
In such scheme, when said source base station sorts the tabulation of generation optimum subdistrict with each sub-district according to the RSRP value, in said optimum subdistrict tabulation, carry the sequence number that sorts according to the RSRQ value from high to low in each sub-district; Or, when said source base station sorts the tabulation of generation optimum subdistrict with each sub-district according to the RSRQ value, in said optimum subdistrict tabulation, carry the sequence number that sorts according to the RSRP value from high to low in each sub-district.
In such scheme; When said source base station receives a plurality of measurement report corresponding to same frequency; In received a plurality of measurement reports,, generate said optimum subdistrict tabulation according to minimum measurement report of the time difference between the moment that receives and the current time corresponding to same frequency.
In such scheme; Comprise the current signal quality class information in each sub-district in the said optimum subdistrict tabulation, said signal quality class information obtains according to sub-district current signal quality parameter value and predefined one or more signal quality parameter threshold value.
The present invention also provides the device that generates the optimum subdistrict tabulation in a kind of carrier aggregation handoff procedure, and said device comprises: receiving element and generation unit, and wherein, receiving element is used to receive measurement report; Generation unit is used for the measurement report that receives according to receiving element in the fixed time, is sorted according to signal quality order from high to low in each sub-district, generates the optimum subdistrict tabulation; Perhaps; Be used for being sorted according to signal quality order from high to low in each sub-district; The tabulation of generation optimum subdistrict, and in this optimum subdistrict tabulation, carry the temporal information that is used to indicate the said measurement report of reception and generates the time difference between the said optimum subdistrict tabulation.
In such scheme, said generation unit also is used for, and is sorted according to RSRP value and/or RSRQ value order from high to low in each sub-district, generates said optimum subdistrict tabulation;
In such scheme, said generation unit also is used for, and when the tabulation of generation optimum subdistrict is sorted according to the RSRP value in each sub-district, in said optimum subdistrict tabulation, carries the sequence number that sorts according to the RSRQ value from high to low in each sub-district; Or, when the tabulation of generation optimum subdistrict is sorted according to the RSRQ value in each sub-district, in said optimum subdistrict tabulation, carry the sequence number that sorts according to the RSRP value from high to low in each sub-district.
Generate the method and the device of optimum subdistrict tabulation in the carrier aggregation handoff procedure provided by the invention; Through utilizing the measurement report in the fixed time to generate the optimum subdistrict tabulation, perhaps in the optimum subdistrict tabulation that generates, carry temporal information, make in the carrier aggregation handoff procedure; When source base station generates the optimum subdistrict tabulation; Call time between each measurement report of institute's foundation and be separated by and can set as required, it is oversize or too short can not to be separated by, and the optimum subdistrict tabulation that source base station passes to target BS has more reference significance; Make target BS can confirm the target Scell that UE will switch more accurately, can effectively avoid meaningless Scell deletion to increase operation.
Description of drawings
Fig. 1 a is the sketch map of UE handoff procedure in the prior art; Fig. 1 b is the sketch map of move between base stations parameter adjustment process in the prior art;
Fig. 2 is the composition structural representation that generates the device of optimum subdistrict tabulation in the carrier aggregation handoff procedure of the present invention;
Fig. 3 is the sub-district distribution schematic diagram of the embodiment of the invention one;
Fig. 4 is the sub-district distribution schematic diagram of the embodiment of the invention two;
Fig. 5 is the sub-district distribution schematic diagram of the embodiment of the invention three.
Embodiment
Basic thought of the present invention is: in source base station passes to the optimum subdistrict tabulation of target BS, increase temporal information, this temporal information is used to indicate and receives measurement report and generate the time difference of optimum subdistrict between tabulating; Perhaps, source base station as available measurement report, sorts the measurement report of receiving in the preassigned time with each sub-district according to these available measurement reports according to signal quality order from high to low, generates the optimum subdistrict tabulation.
Wherein, the said preassigned time is used to represent to receive the threshold value of time difference between measurement report and the tabulation of generation optimum subdistrict, can be through consulting to specify in advance between agreement regulation or base station.
Wherein, said temporal information specifically can be for receiving the absolute value of time difference between the said optimum subdistrict tabulation of said measurement report and generation; Perhaps, also can for through consult between agreement regulation or base station to confirm, be used to indicate receive said measurement report with generate said optimum subdistrict tabulate between the branch value of series of time difference.
Generate the device of optimum subdistrict tabulation in the carrier aggregation handoff procedure of the present invention, as shown in Figure 2, can comprise receiving element 21 and generation unit 22, wherein, receiving element 21 is used to receive the measurement report that UE reports; Generation unit 22 is used for the measurement report that receives according to receiving element in the fixed time, is sorted according to signal quality order from high to low in each sub-district, generates the optimum subdistrict tabulation; Perhaps; Be used for being sorted according to signal quality order from high to low in each sub-district; Generation optimum subdistrict tabulation, and in this optimum subdistrict tabulation, carry be used to indicate receive said measurement report with generate said optimum subdistrict tabulate between the temporal information of time difference.
Particularly, generation unit 22 sorts each sub-district according to RSRP value and/or RSRQ value order from high to low, generates said optimum subdistrict tabulation.When the tabulation of generation optimum subdistrict was sorted according to the RSRP value in each sub-district, generation unit 22 can carry the sequence number that sorts according to the RSRQ value from high to low in each sub-district in said optimum subdistrict tabulation; And/or when the tabulation of generation optimum subdistrict was sorted according to the RSRQ value in each sub-district, generation unit 22 can also carry the sequence number that sorts according to the RSRP value from high to low in each sub-district in said optimum subdistrict tabulation.
The device that generates the optimum subdistrict tabulation in the described carrier aggregation handoff procedure can be arranged on the source base station, also can be independent of beyond the source base station to be provided with.
The scene of switching to the X2 mouth is below done further explain to concrete implementation of the present invention.
Embodiment one
As shown in Figure 3, UE has disposed the Cell_2 on sub-district (Cell) 1 and the frequency F2 on the frequency F1 in communication process, and wherein, Cell_1 is Pcell, and Cell_2 is Scell, and source base station is that UE has disposed following measuring task:
MID＝1，MO＝F1，RC＝A2
MID＝2，MO＝F2，RC＝A2
MID=3, MO=F1, RC=A3, specifying Offsets is-10db
MID=4, MO=F2, RC=A6, specifying Offsets is-8db
MID=5, MO=F3, RC=A3, specifying Offsets is-10db
MID=6, MO=F3, RC=periodic report
Behind the 1s, at T1 constantly, UE reports the measurement report of MID=5; The cell list that comprises in this measurement report is: Cell_7 (RSRP=43;-98dbm)/Cell_8 (RSRP=42 ,-99dbm), carry the signal quality parameter value (RSRP=51 of Cell_1;-90dbm) with the signal quality parameter value of Cell_2 (RSRP=51 ,-90dbm).
T1 is back 1s constantly, i.e. in the T2 moment, UE reports the measurement report of MID=6; The cell list that comprises in this measurement report is: Cell_7 (RSRP=40 ,-101dbm)/Cell_8 (RSRP=36 ,-105dbm)/Cell_9 (RSRP=31;-110dbm), carry Cell_1 signal quality parameter value (RSRP=56 ,-85dbm); The signal quality parameter value of Cell_2 (RSRP=54 ,-87dbm).
T2 is back 500ms constantly, i.e. in the T3 moment, UE reports the measurement report of MID=4; The cell list that comprises in this measurement report is: C ell_4 (RSRP=47;-94dbm)/Cell_6 (RSRP=43 ,-98dbm), carry the signal quality parameter value (RSRP=40 of Cell_1;-101dbm) with the signal quality parameter value of Cell_2 (RSRP=39 ,-102dbm).
T3 constantly; UE also reports the measurement report of MID=3, and the cell list that comprises is: Cell_3 (RSRP=46 ,-95dbm)/Cell_5 (RSRP=42;-99dbm); Carry Cell_1 signal quality (RSRP=41 ,-100dbm) with the signal quality parameter value of Cell_2 (RSRP=39 ,-102dbm).
T3 constantly; The base station is according to above-mentioned measurement report, and decision switches to the Cell_4 on the frequency F2 with UE, and the Pcell that is about to UE is replaced by the Cell_4 on the frequency F2; The optimum subdistrict tabulation that source base station need generate; And send to the base station of Cell_4 ownership and to carry the handoff request message that generates the optimum subdistrict tabulation to some extent, wherein, the mode that source base station generates the optimum subdistrict tabulation can comprise following three kinds:
Mode one: stipulate according to agreement; Source base station need be the measurement report of receiving in the constantly preceding 2s of T3 according to current time; The optimum subdistrict tabulation that generation will be carried; Particularly; In three measurement reports of the MID=3/4/6 that source base station is received in the 2s before with current time, the cell list on the frequency F3 is Cell_7/Cell_8/Cell_9 according to signal quality parameter value such as the ordering from high to low of Reference Signal Received Power (RSRP, Reference Signal Received Power) value; Cell list on the frequency F2 sorts from high to low according to signal quality and is Cell_4/Cell_6/Cell_2, and the cell list on the frequency F1 sorts from high to low according to signal quality and is Cell_3/Cell_5/Cell_1; In the practical application, if require corresponding sub-district of each frequency in the optimum subdistrict tabulation, source base station is according to above-mentioned ranking results; The optimum subdistrict tabulation that generates is Cell_4/Cell_3/Cell_7, if require the corresponding a plurality of sub-districts of each frequency in the optimum subdistrict tabulation, like corresponding three sub-districts on each frequency; Source base station is according to above-mentioned ranking results; The optimum subdistrict tabulation that generates can be Cell_4/Cell_6/Cell_2/Cell_3/Cell_5/Cell_1/Cell_7/Cell_8/ Cell_9, wherein, and in the optimum subdistrict tabulation that generates; The sub-district of same frequency is arranged in together, arranges optimum subdistrict according to frequency order F1/F2/F3 in the present embodiment.
Wherein, the concrete identification method of optimum subdistrict tabulation can comprise: a plurality of sub-districts of same carrier frequency through a carrier frequency add a plurality of PCI (Physical Cell Identity), or a measuring task sign add that a plurality of PCI identify.Perhaps, its carrier frequency information and PCI information or measuring task sign and PCI message identification are passed through in each sub-district in the optimum subdistrict tabulation.
In the said process, the optimum subdistrict tabulation is according to generating apart from the measurement report of receiving in the current time 2s, and preassigned time 2s can also can consult to obtain through the agreement regulation through move between base stations parameter adjustment process.
If the time that sets is 3s, so, source base station just need generate the optimum subdistrict tabulation according to the measurement report of MID=3/4/5/6.
In the said process, sorted according to its RSRP value from high to low in the sub-district in the measurement report, in the practical application, can also be according to Reference Signal Received Quality (RSRQ, Reference Signal ReceivedQuality) the value ordering from high to low of each sub-district.Here, the parameter of ordering institute foundation can also can be confirmed through negotiation between the base station through the agreement regulation, particularly, can consult to confirm through the adjustment process of move between base stations parameter.
Mode two: after selecting available measurement report; Source base station is with each sub-district in the available measurement report; Sort from high to low according to signal quality parameter value; The tabulation of generation optimum subdistrict, like this, the tabulation of the optimum subdistrict of generation is Cell_4/Cell_3/Cell_6/Cell_5/Cell_1/Cell_7/Cell_2/Cell_8/ Cell_9.
Here; According to actual needs, can also limit the sub-district number that can comprise in the optimum subdistrict tabulation according to the number of cells threshold value of setting; For example; Limit 6 sub-districts that comprise in the optimum subdistrict tabulation, then, the tabulation of the optimum subdistrict of generation is Cell_4/Cell_3/Cell_6/Cell_5/Cell_1/Cell_7.
The number of cells threshold value can also can be confirmed through negotiation between the base station through the agreement regulation, for example can confirm the number of cells threshold value through move between base stations parameter adjustment process.
Here; The number of cells threshold value can be used for representing the number upper limit of optimum subdistrict all sub-districts that tabulation comprises; Also can represent in the optimum subdistrict tabulation all sub-district number upper limits under the carrier frequency; At present, the number of cells threshold value is defined as the number upper limit that comprises all sub-districts in the optimum subdistrict tabulation, more meets the needs of practical application.
Mode three: source base station generates the optimum subdistrict tabulation according to all measurement reports; In the tabulation of this optimum subdistrict, carry each sub-district the temporal information of corresponding measurement report; Like this, the target BS Target cell that just can will switch according to the decision UE that calls time on the measurement report of each sub-district.
Here, can said temporal information be carried out the classification setting in advance, in the present embodiment; Preestablish said temporal information and comprise three grades, particularly, the measurement report of receiving in the current 1s of distance; The temporal information value of its sub-district is 0, the measurement report of receiving in the current 2s of distance, and the temporal information value of its sub-district is 1; Distance is current to surpass 2s, do not comprise the measurement report that 2s receives, the temporal information value of its sub-district is 2.
The classification setting of temporal information can also can for example can be consulted to realize through consulting realization between the base station through moving parameter adjustment process between current base station through the agreement regulation.
For example, corresponding sub-district of each frequency in requiring the optimum subdistrict tabulation, the optimum subdistrict tabulation that generates according to mode three can be (Cell_4,0)/(Cell_3,0)/(Cell_7,1).
Here, said temporal information also can represent with the absolute time value, like 500ms, and 1500ms, at this moment, the value of temporal information equals current time and receives the time difference between measurement report is constantly.
In the present embodiment; Because each measurement report all carries the main Serving cell of UE and the signal quality parameter value of auxilliary Serving cell; When sorted in the sub-district; The signal quality parameter value of the signal quality parameter value of the auxilliary Serving cell in source master's Serving cell and source when nearest apart from current time is as the criterion, when generating the optimum subdistrict tabulation, in order to save the auxilliary Serving cell of source master's Serving cell and/or source that signaling consumption also can not comprise UE.Certainly assist Serving cell in order to embody source master's Serving cell and source, and the relativeness of the signal quality of other abutting subdistricts, the auxilliary Serving cell in the source master's Serving cell of UE and/or source also can be included in the tabulation.
Here; In the said optimum subdistrict tabulation, can also include current signal quality parameter value in each sub-district such as RSRP value and/or RSRQ value, perhaps can comprise the current signal quality class information in each sub-district; Like this, target BS can be known the signal quality situation that each sub-district is current.Wherein, the signal quality class information can obtain according to the current signal quality parameter value in each sub-district such as RSRP value and/or RSRQ value and predefined one or more signal quality parameter threshold value such as RSRP threshold value and/or RSRQ threshold value.For example, can be set in the RSRP value be higher than-during 90dbm, be 1 grade, the RSRP value at-90dbm between-the 100dbm; Be 2 grades, the RSRP value is lower than-and during 100dbm, be 3 grades; For example, the RSCP value of a sub-district is-58dbm that then its signal instruction class information is 1 grade.
Perhaps; In said optimum subdistrict tabulation; Can comprise the signal quality parameter value of main Serving cell such as the measuring task sign (MeasId) of RSRP value and each sub-district; Like this, target BS can pass through these two parameters, estimates the signal quality parameter value such as the RSRP value of each sub-district in the optimum subdistrict tabulation.
Embodiment two
As shown in Figure 4, UE has disposed Cell_1 and the Cell_2 on the frequency F2 on the frequency F1 in communication process, and wherein Cell_1 is Pcell, and Cell_2 is Scell, and source base station is that UE has disposed following measuring task simultaneously:
MID＝1，MO＝F1，RC＝A2
MID＝2，MO＝F2，RC＝A2
MID=3, MO=F1, RC=A3, specifying Offsets is-10db
MID=4, MO=F2, RC=A6, specifying Offsets is-8db
MID=5, MO=F3, RC=A3, specifying Offsets is-10db
MID=6, MO=F3, RC=A4, appointed threshold is-111dbm
Behind the 1s, i.e. in the T1 moment, UE reports the measurement report of MID=6; The cell list that comprises is: Cell_7 (RSRP=40 ,-101dbm)/Cell_8 (RSRP=36 ,-105dbm)/Cell_9 (RSRP=31;-110dbm), carry Cell_1 signal quality parameter value (RSRP=56 ,-85dbm); The signal quality parameter value of Cell_2 (RSRP=54 ,-87dbm).
T1 is back 1s constantly, i.e. in the T2 moment, UE reports the measurement report of MID=5; The cell list that comprises is: Cell_7 (RSRP=43;-98dbm)/Cell_8 (RSRP=42 ,-99dbm), carry the signal quality parameter value (RSRP=51 of Cell_1;-90dbm) and the signal quality parameter value of Cell_2 (RSRP=51 ,-90dbm).
T2 is back 500ms constantly, i.e. in the T3 moment, UE reports the measurement report of MID=4; Comprise cell list: Cell_4 (RSRP=47;-94dbm)/Cell_6 (RSRP=43 ,-98dbm), carry the signal quality parameter value (RSRP=48 of Cell_1;-93dbm) with the signal quality parameter value of Cell_2 (RSRP=39 ,-102dbm).
In the T3 moment, UE also reports the measurement report of MID=3, and the cell list that comprises is: Cell_3 (RSRP=46;-95dbm)/Cell_5 (RSRP=42;-99dbm), carry Cell_1 signal quality parameter value (RSRP=41 ,-100dbm) be sky with the signal quality parameter value of Cell_2.
T3 constantly; The base station is according to above-mentioned measurement report, and the source base station decision switches to the Cell_4 on the frequency F2 with UE, and Pcell is replaced by the Cell_4 on the frequency F2; The generation optimum subdistrict is tabulated, and sends the handoff request message that carries this optimum subdistrict tabulation to the base station of Cell_4 ownership.
In the present embodiment, the generating mode of optimum subdistrict tabulation is identical with embodiment one, and different is; Two different measuring reports are arranged, and what all comprise in the measurement report of MID=6/5 is the cell list on the frequency F3, at this moment; When generating the optimum subdistrict tabulation, source base station was as the criterion with minimum result of current time time difference with the moment of receiving measurement report, in the present embodiment; T2 receives the measurement report of MID=5 constantly, receives constantly and the time difference of current time, compares with the measurement report of MID=6; Less, be as the criterion with the signal quality parameter value of each sub-district in the measurement report of MID=5, generate the optimum subdistrict tabulation.Particularly, with Cell_7 (RSRP=44 ,-97dbm) and Cell_8 (RSRP=43 ,-98dbm) be as the criterion owing to do not comprise the signal quality parameter value parameter of Cell_9 in the measurement report of MID=5, therefore, when generating the optimum subdistrict tabulation, get rid of Cell_9.
In addition, in the measurement report of MID=3, the signal quality parameter value of Cell_2 is not empty; Just can't detect less than Cell_2; And receiving of this measurement report is minimum with the time difference of current time constantly, when then generating the optimum subdistrict tabulation, also gets rid of Cell_2.
In addition; For three kinds of modes among the embodiment one; If said source base station receives a plurality of measurement reports corresponding to same frequency; In the received a plurality of measurement reports corresponding to same frequency, source base station all needs to generate said optimum subdistrict tabulation according to the moment that receives and minimum measurement report of the time difference between the current time.
Embodiment three
Shown in Figure 5, UE has disposed Cell_1 and the Cell_2 on the frequency F2 on the frequency F1 in communication process, and wherein Cell_1 is Pcell, and Cell_2 is Scell, has disposed following measuring task simultaneously:
MID＝1，MO＝F1，RC＝A2
MID＝2，MO＝F2，RC＝A2
MID=3, MO=F1, RC=A3, specifying Offsets is-10db
MID=4, MO=F2, RC=A6, specifying Offsets is-8db
MID=5, MO=F3, RC=A3, specifying Offsets is-10db
MID=6, MO=F4, RC=A4, appointed threshold is-111dbm
Behind the 1s, i.e. in the T1 moment, UE reports the measurement report of MID=6, and the cell list that comprises is: Cell_7 (RSRP=40 ,-101dbm; RSRQ=8 ,-16db)/Cell_8 (RSRP=36 ,-105dbm, RSRQ=7 ,-16.5db)/Cell_9 (RSRP=31;-110dbm, RSRQ=7 ,-16.5db), carry signal quality parameter value (the RSRP=56 ,-85dbm of Cell_1; RSRQ=20 ,-10db) with the signal quality parameter value of Cell_2 (RSRP=54 ,-87dbm, RSRQ=18 ,-11db).
T1 is back 1s constantly, i.e. in the T2 moment, UE reports the measurement report of MID=5, and the cell list that comprises is: Cell_3 (RSRP=43 ,-98dbm; RSRQ=12 ,-14db)/Cell_10 (RSRP=42 ,-99dbm, RSRQ=11;-14.5db), carry signal quality parameter value (RSRP=51 ,-90dbm, the RSRQ=16 of Cell_1;-12db) with the signal quality parameter value of Cell_2 (RSRP=51 ,-90dbm, RSRQ=15 ,-12.5db).
T2 is back 500ms constantly, i.e. in the T3 moment, UE reports the measurement report of MID=4, and the cell list that comprises is: Cell_4 (RSRP=45 ,-96dbm; RSRQ=6 ,-17db)/Cell_6 (RSRP=43 ,-98dbm, RSRQ=5;-17.5db), carry signal quality parameter value (RSRP=48 ,-93dbm, the RSRQ=14 of Cell_1;-13db) with the signal quality parameter value of Cell_2 (RSRP=39 ,-102dbm, RSRQ=13 ,-13.5db).
T3 is back 500ms constantly, i.e. in the T4 moment, UE reports the measurement report of MID=3, and the cell list that comprises is: Cell_11 (RSRP=46 ,-95dbm; RSRQ=17 ,-11.5db)/Cell_12 (RSRP=42 ,-99dbm, RSRQ=18;-11db), carry signal quality parameter value (RSRP=41 ,-100dbm, the RSRQ=4 of Cell_1;-18db) with the signal quality parameter value of Cell_2 (RSRP=38 ,-103dbm, RSRQ=4 ,-18db).
In the T4 moment, the base station is according to above-mentioned measurement report, and decision switches to the Cell_11 on the frequency F1 with the Pcell of UE, sends handoff request message to the base station of Cell_11 ownership; And carry the optimum subdistrict tabulation, and in the present embodiment, the mode that source base station generates the optimum subdistrict tabulation is identical with embodiment one, and different is; In the present embodiment, sorted in each sub-district, and generating the optimum subdistrict tabulation, also carrying the RSRQ value sequence number of each sub-district in this optimum subdistrict tabulation according to RSRP ordering; For example, the tabulation of the optimum subdistrict of generation can be (Cell_11,1)/(Cell_4,4)/(Cell_3; 2)/(Cell_7,3), wherein 1 in (Cell_11,1) is the RSRQ value sequence number of Cell_11; Be illustrated in the sequence of cells of arranging from high in the end according to the RSRQ value, Cell_11 is in the first place, (Cell_7; 3) 3 in are the RSRQ value sequence number of Cell_7, are illustrated in the sequence of cells of arranging from high in the end according to the RSRQ value, and Cell 7 is in the 3rd.
Generate optimum subdistrict tabulation if sort from high to low, then can in the optimum subdistrict tabulation, carry the RSRP value sequence number of each sub-district, for example according to the RSRQ value; For optimum subdistrict tabulation (Cell_11,1)/(Cell_3,3)/(Cell_7; 4), 1 in (Cell_4,2) are the RSRP value sequence number of Cell_11; Be illustrated in the sequence of cells of arranging from high in the end according to the RSRQ value, Cell_11 is in first, is optimum subdistrict.
Since source base station and target BS switch other when mutual; The relevant information of the mutual target master's Serving cell of meeting, therefore, when generating the optimum subdistrict tabulation; Can not comprise target master Serving cell, to reduce the repetition of the information of transmitting between source base station and the target BS.
The above embodiment of the present invention only relates to the scene that the X2 mouth switches, and in the practical application, for the scene that the S1 mouth switches, the present invention also can use, and implementation procedure and the foregoing description are basic identical, repeat no more at this.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. generate the method that optimum subdistrict is tabulated in a carrier aggregation handoff procedure, it is characterized in that said method comprises:
Source base station sorts each sub-district according to the measurement report that receives in the preassigned time according to signal quality order from high to low, generate the optimum subdistrict tabulation.
2. generate the method for optimum subdistrict tabulation in the carrier aggregation handoff procedure according to claim 1; It is characterized in that; When the said preassigned time is used to represent to receive said measurement report and generate the threshold value of time difference between the said optimum subdistrict tabulation, through consulting to specify in advance between agreement regulation or base station.
3. generate the method for optimum subdistrict tabulation in the carrier aggregation handoff procedure according to claim 1, it is characterized in that,
Comprise the current signal quality class information in each sub-district in the said optimum subdistrict tabulation, said signal quality class information obtains according to sub-district current signal quality parameter value and predefined one or more signal quality parameter threshold value.
4. generate the method for optimum subdistrict tabulation in the carrier aggregation handoff procedure according to claim 1; It is characterized in that; In the preassigned time, when said source base station receives a plurality of measurement report corresponding to same frequency, in received a plurality of measurement reports corresponding to same frequency; According to minimum measurement report of time difference between the moment that receives and the current time, generate said optimum subdistrict tabulation.
5. according to the method that generates the optimum subdistrict tabulation in each described carrier aggregation handoff procedure of claim 1 to 4, it is characterized in that said source base station sorts each sub-district according to signal quality order from high to low, comprising:
Said source base station sorts each sub-district according to RSRP value or RSRQ value order from high to low.
6. generate the method for optimum subdistrict tabulation in the carrier aggregation handoff procedure according to claim 5, it is characterized in that,
When said source base station sorts the tabulation of generation optimum subdistrict with each sub-district according to the RSRP value, in said optimum subdistrict tabulation, carry the sequence number that sorts according to the RSRQ value from high to low in each sub-district;
Or, when said source base station sorts the tabulation of generation optimum subdistrict with each sub-district according to the RSRQ value, in said optimum subdistrict tabulation, carry the sequence number that sorts according to the RSRP value from high to low in each sub-district.
7. generate the method that optimum subdistrict is tabulated in a carrier aggregation handoff procedure, it is characterized in that said method comprises:
Source base station is according to the measurement report that receives; Sorted according to signal quality order from high to low in each sub-district; Generation optimum subdistrict tabulation, and in this optimum subdistrict tabulation, carry be used to indicate receive said measurement report with generate said optimum subdistrict tabulate between the temporal information of time difference.
8. generate the method for optimum subdistrict tabulation in the carrier aggregation handoff procedure according to claim 7, it is characterized in that said source base station sorts each sub-district according to signal quality order from high to low, comprising:
Said source base station sorts each sub-district according to RSRP value or RSRQ value order from high to low.
9. generate the method for optimum subdistrict tabulation in the carrier aggregation handoff procedure according to claim 8, it is characterized in that,
When said source base station sorts the tabulation of generation optimum subdistrict with each sub-district according to the RSRP value, in said optimum subdistrict tabulation, carry the sequence number that sorts according to the RSRQ value from high to low in each sub-district;
Or, when said source base station sorts the tabulation of generation optimum subdistrict with each sub-district according to the RSRQ value, in said optimum subdistrict tabulation, carry the sequence number that sorts according to the RSRP value from high to low in each sub-district.
10. according to the method that generates the optimum subdistrict tabulation in each described carrier aggregation handoff procedure of claim 7 to 9; It is characterized in that; When said source base station receives a plurality of measurement report corresponding to same frequency; In received a plurality of measurement reports,, generate said optimum subdistrict tabulation according to minimum measurement report of the time difference between the moment that receives and the current time corresponding to same frequency.
11. the method according to generating the optimum subdistrict tabulation in each described carrier aggregation handoff procedure of claim 7 to 9 is characterized in that,
Comprise the current signal quality class information in each sub-district in the said optimum subdistrict tabulation, said signal quality class information obtains according to sub-district current signal quality parameter value and predefined one or more signal quality parameter threshold value.
12. generate the device that optimum subdistrict is tabulated in the carrier aggregation handoff procedure, it is characterized in that said device comprises: receiving element and generation unit, wherein,
Receiving element is used to receive measurement report;
Generation unit is used for the measurement report that receives according to receiving element in the fixed time, is sorted according to signal quality order from high to low in each sub-district, generates the optimum subdistrict tabulation; Perhaps; Be used for being sorted according to signal quality order from high to low in each sub-district; The tabulation of generation optimum subdistrict, and in this optimum subdistrict tabulation, carry the temporal information that is used to indicate the said measurement report of reception and generates the time difference between the said optimum subdistrict tabulation.
13. generate the device of optimum subdistrict tabulation in the carrier aggregation handoff procedure according to claim 12, it is characterized in that said generation unit also is used for,
Sorted according to RSRP value and/or RSRQ value order from high to low in each sub-district, generate said optimum subdistrict tabulation.
14. generate the device of optimum subdistrict tabulation in the carrier aggregation handoff procedure according to claim 13, it is characterized in that said generation unit also is used for,
When the tabulation of generation optimum subdistrict is sorted according to the RSRP value in each sub-district, in said optimum subdistrict tabulation, carry the sequence number that sorts according to the RSRQ value from high to low in each sub-district;
Or, when the tabulation of generation optimum subdistrict is sorted according to the RSRQ value in each sub-district, in said optimum subdistrict tabulation, carry the sequence number that sorts according to the RSRP value from high to low in each sub-district.
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