CN103812625B - A kind of method and apparatus for determining Downlink Control Information based on carrier aggregation - Google Patents

Abstract

It is an object of the invention to provide a kind of method and apparatus for being used to determine Downlink Control Information based on carrier aggregation.Specifically, the physical layer control signaling from eNB is received, wherein, physical layer control signaling includes the configured information for the dispatch service cell that eNB is determined based on carrier aggregation；According to the configured information, space search operation is performed in the dispatch service cell corresponding with configured information, obtains the Downlink Control Information for corresponding to the dispatch service cell corresponding to configured information.Compared with prior art, user equipment of the present invention is according to the configured informations of the eNB that the physical layer control signaling from eNB received the includes dispatch service cells determined based on carrier aggregation, space search operation is performed in the dispatch service cell corresponding with configured information, obtain Downlink Control Information, space search need to only be carried out in dispatch service cell by realizing user equipment, so as to accelerate the process that user equipment obtains Downlink Control Information, the loss of power and search time are reduced.

Description

A kind of method and apparatus for determining Downlink Control Information based on carrier aggregation

Technical field

The present invention relates to communication technical field, more particularly to a kind of skill that Downlink Control Information is determined based on carrier aggregation Art.

Background technology

Currently, CA (carrier aggregation, Carrier Aggregation) is a pass in LTE (3GPP Long Term Evolutions) R10 Key technology, the eNB (evolved base station, evolvedNode B) based on CA adjust for UE (user equipment, User Equipment) When spending (schedule) serving cell (Serving Cell), it can be that UE dispatches multiple serving cells simultaneously, be configured with CA UE It is connected with 1 PCell (main plot, Primary Cell) and at most 4 SCell (secondary cell, Secondary Cell), UE's PCell and all SCell constitutes the service cell set of the UE, member carrier (Component corresponding to PCell Carrier, CC) it is main member carrier (Primary Component Carrier, PCC), member carrier corresponding to SCell (Component Carrier) is secondary member carrier (Secondary Component Carrier, SCC).

If eNB does not configure CIF (carrier wave instructions field, Carrier Indicator Field) for UE, UE is needed each In individual activation serving cell (Activated Serving Cell) each set class (Aggregation Level) 1, 2nd, a USS (dedicated search space, UE-Specific Search Space) is monitored at 4,8.If UE is configured for CIF, UE Need to monitor one in each set class 1,2,4,8 in the one or more activation serving cells configured by high-level signaling Individual or multiple USS.For example, it is assumed that as shown in figure 1, UE activation serving cell is PCel1 and secondary cell SCell1/SCell2/ SCell3/SCell4, it has to carry out allowance search in this 5 activation serving cells for PDSCH, even if it is only scheduled Activated at 1 in serving cell rather than whole activation serving cells, although in LTE R10, UE can be currently all in fact Space search is carried out in the possibility scheduling cell of activation serving cell, but UE does not know to scheduled how many individual serving cells for it, This large amount of space search time that UE a large amount of power have been lost and have taken UE.

The content of the invention

It is an object of the invention to provide a kind of method and apparatus for being used to determine Downlink Control Information based on carrier aggregation.

According to an aspect of the invention, there is provided a kind of be used to determine descending control based on carrier aggregation at user equipment end The method of information processed, wherein, this method comprises the following steps：

A receives the physical layer control signaling from eNB, wherein, the physical layer control signaling includes the eNB and is based on carrying The configured information for one or more dispatch service cells that ripple polymerization determines；

B performs space search according to the configured information in the dispatch service cell corresponding with the configured information Operation, to obtain the Downlink Control Information for corresponding to the dispatch service cell corresponding to the configured information.

According to another aspect of the present invention, one kind is additionally provided to be used to determine descending control based on carrier aggregation at eNB ends The method of information processed, wherein, this method comprises the following steps：

A is based on carrier aggregation, and one or more dispatch service cells are determined for user equipment；

B sends physical layer control signaling to the user equipment, wherein, the physical layer control signaling includes one Or the configured information of multiple dispatch service cells.

According to an aspect of the present invention, a kind of use for being used to determine Downlink Control Information based on carrier aggregation is additionally provided Family equipment, wherein, the user equipment includes：

First signaling reception device, for receiving the physical layer control signaling from eNB, wherein, the physical layer control Signaling includes the configured information for one or more dispatch service cells that the eNB is determined based on carrier aggregation；

Performs device is searched for, it is small in the dispatch service corresponding with the configured information for according to the configured information Space search operation is performed in area, to obtain the descending control letter for corresponding to the dispatch service cell corresponding to the configured information Breath.

According to another aspect of the present invention, additionally provide a kind of auxiliary that is used for and descending control letter is determined based on carrier aggregation The eNB base stations of breath, wherein, the eNB base stations include：

Cell determining device, for based on carrier aggregation, one or more dispatch service cells to be determined for user equipment；

First signaling sending device, for sending physical layer control signaling to the user equipment, wherein, the physical layer Control signaling includes the configured information of one or more of dispatch service cells.

According to a further aspect of the invention, a kind of communication system is additionally provided, wherein, the communication system includes foregoing According to the user equipment for being used to determine based on carrier aggregation Downlink Control Information of one aspect of the invention, and it is foregoing according to this The eNB base stations for being used to aid in determine Downlink Control Information based on carrier aggregation of invention other side.

Compared with prior art, user equipment of the present invention wraps according in the physical layer control signaling from eNB received The configured information for one or more dispatch service cells that the eNB included is determined based on carrier aggregation, with the configured information phase Space search operation is performed in corresponding dispatch service cell, to obtain corresponding to the dispatch service corresponding to the configured information The Downlink Control Information of cell, realize user equipment once demodulating PDCCH obtains DCI, no matter the physics number of plies corresponding to the DCI Correctly whether according to, user equipment can obtain the serving cell that eNB is its scheduling, so as to which user equipment need to only take in such scheduling Space search is carried out in business cell, and then accelerates the process that user equipment obtains correct Downlink Control Information, reduces use The loss of power of family equipment and space search time, improve the space search efficiency of user equipment.Further, user equipment It may also be combined with the excellent of one or more of dispatch service cells that the MAC layer control signaling from eNB received includes First level information, space search operation is performed in the dispatch service cell corresponding with the configured information, so as to more further Ground accelerates the process that user equipment obtains Downlink Control Information, when reducing the loss of power and space search of user equipment Between, improve the space search efficiency of user equipment.

Brief description of the drawings

By reading the detailed description made to non-limiting example made with reference to the following drawings, of the invention is other Feature, objects and advantages will become more apparent upon：

Fig. 1 shows that eNB is that the activation serving cell quantity of UE configurations distributes schematic diagram in the prior art；

Fig. 2 shows the user equipment for being used to determine Downlink Control Information based on carrier aggregation according to one aspect of the invention With the equipment schematic diagram of eNB base stations；

Fig. 3 shows the use for being used to determine Downlink Control Information based on carrier aggregation in accordance with a preferred embodiment of the present invention Family equipment and the equipment schematic diagram of eNB base stations；

Fig. 4 show according to one aspect of the invention be used for based on carrier aggregation determine Downlink Control Information in MAC The schematic diagram of the increased precedence information including dispatch service cell in layer control signaling；

Fig. 5 shows that user equipment according to a further aspect of the present invention and eNB base stations coordinate for true based on carrier aggregation Determine the method flow diagram of Downlink Control Information；

Fig. 6 shows that user equipment in accordance with a preferred embodiment of the present invention and eNB base stations are coordinated for being gathered based on carrier wave Close the method flow diagram for determining Downlink Control Information.

Same or analogous reference represents same or analogous part in accompanying drawing.

Embodiment

The present invention is described in further detail below in conjunction with the accompanying drawings.

Fig. 2 shows the user equipment for being used to determine Downlink Control Information based on carrier aggregation according to one aspect of the invention 1 and eNB base stations 2, wherein, user equipment 1 includes the first signaling reception device 11 and search performs device 12, and eNB base stations 2 include The signaling sending device 22 of cell determining device 21 and first.Specifically, the cell determining device 21 of eNB base stations 2 is gathered based on carrier wave Close, one or more dispatch service cells are determined for user equipment 1；First signaling sending device 22 is sent out to the user equipment 1 Physical layer control signaling is sent, wherein, the physical layer control signaling includes the instruction of one or more of dispatch service cells Information；Correspondingly, the first signaling reception device 11 of user equipment 1 receives the physical layer control signaling from eNB, wherein, institute Stating physical layer control signaling includes the instruction letter for one or more dispatch service cells that the eNB is determined based on carrier aggregation Breath；Performs device 12 is searched for according to the configured information, is performed in the dispatch service cell corresponding with the configured information Space search operates, to obtain the Downlink Control Information for corresponding to the dispatch service cell corresponding to the configured information.

Here, the user equipment refers in a mobile communication device, terminate from or deliver to being wirelessly transferred for network, and The ability of terminal device is fitted to the equipment of the part being wirelessly transferred, i.e. user's access to mobile network, it includes but is not limited to Any one can carry out man-machine interaction by keyboard, touch pad or voice-operated device with user and can pass through mobile network and base station Carry out the mutual transmission of signal and receive to reach the electronic product of the transmission of mobile communication signal, such as tablet personal computer, intelligence Mobile phone, PDA, vehicle-mounted computer etc..Here, the eNB base stations refer in GSM, be connected part and radio section Point, and the equipment being connected with mobile station is wirelessly transferred by aerial.Here, the mobile network include but is not limited to GSM, 3G, TD-LTE, Wi-Fi, WiMax, WCDMA, CDMA2000, TD-SCDMA, HSPA, LTD etc..Those skilled in the art should be able to manage Above-mentioned user equipment, eNB base stations and mobile network is solved to be only for example, other existing or user equipmenies for being likely to occur from now on or Base station or mobile network are such as applicable to the present invention, should also be included within the scope of the present invention, and herein by reference It is incorporated herein.

Specifically, the cell determining device 21 of eNB base stations 2 is based on carrier aggregation, can be believed according to current schedulable resource Cease the member carrier quantity that can such as integrate and its frequency range, the interference information of the one or more cells adjacent with base station, Yong Hushe Standby down channel relevant information (such as channel quality and influence the other information such as network condition of channel quality), user equipment Downlink data amount information etc., determine one or more dispatch service cells for user equipment 1.Here, the serving cell bag Include but be not limited to such as PCell, SCell.For example, it is assumed that after UE1 is connected by PCell with base station eNB completion RRC, base station ENB is little according to downlink data amount of the UE1 relevant information as judged UE1, then cell determining device 21 is based on carrier aggregation, really It is set to UE1 and dispatches 1 secondary cell SCell1；If base station eNB according to UE2 relevant information as judge UE2 downlink data amount compared with Greatly, i.e. the PCell loads of UE2 are higher, then cell determining device 21 is based on carrier aggregation, are defined as UE2 and dispatch 4 secondary cells such as SCell1/SCell2/SCell3/SCell4。

Those skilled in the art will be understood that the above-mentioned mode that one or more dispatch service cells are determined for user equipment It is only for example, other modes that one or more dispatch service cells are determined for user equipment that are existing or being likely to occur from now on The present invention is such as applicable to, should be also included within the scope of the present invention, and be incorporated herein by reference herein.

Preferably, cell determining device 21 can also update assisted cell first with activation/deactivation MAC Control Element State of activation；Then, then based on carrier aggregation, the assisted cell after being updated to state of activation is scheduled, with determination and institute State the corresponding one or more of dispatch service cells of user equipment.For example, it is assumed that descending letter of the base station eNB according to UE1 Road quality, which is defined as it, dispatches main plot PCell and 2 secondary cell such as SCell1/SCell2, wherein, SCell2 is deactivation shape State, and cell determining device 21 finds that UE1 can not for activation the serving cell such as PCell and SCell1 of its scheduling in base station eNB Meet its existing data transfer, then cell determining device 21 will aid in small first with activation/deactivation MAC Control Element Area SCell2 is updated to state of activation by deactivation status；Then, cell determining device 21 is based on carrier aggregation again, to activating shape Assisted cell after state renewal is scheduled, and is defined as UE1 scheduling main plot PCell and 2 secondary cell such as SCell1/ SCe1l2.For another example, it is assumed that base station eNB is defined as it according to UE2 down channel quality dispatches main plot PCell and 4 auxiliary small Area such as SCell1/SCell2/SCell3/SCell4, and cell determining device 21 finds that UE2 swashs in base station eNB for what it was dispatched There is no data transfer within a period of time in living serving cell such as SCell4, then cell determining device 21 first with activation/ MAC Control Element is deactivated, assisted cell SCell4 is updated to deactivation status by state of activation；Then, cell determines Device 21 is based on carrier aggregation again, and the assisted cell after being updated to state of activation is scheduled, and is defined as UE2 scheduling main plot PCell and 3 secondary cell such as SCell1/SCell2/SCell3.

Those skilled in the art will be understood that the mode of the state of activation of above-mentioned renewal assisted cell is only for example, and other are existing The mode of the state of activation of renewal assisted cell that is having or being likely to occur from now on is such as applicable to the present invention, should also be included in this Within invention protection domain, and it is incorporated herein by reference herein.

First signaling sending device 22 passes through mobile network such as TD-LTE (timesharing Long Term Evolution, Time Division Long Term Evolution), physical layer control signaling is sent to the user equipment, wherein, the physical layer control signaling Include the configured information of one or more of dispatch service cells.Here, the physical layer control signaling is used for instruction user The resource allocation of equipment and other control information, it includes but is not limited to such as DCI (Downlink Control Infornation) signaling.Here, the configured information is included in the increased service for being used to represent that eNB is UE scheduling in DCI Bitmap (bitmap) information of cell, as the message bit pattern is represented with 8bit, every bit positions represent a serving cell, should Which serving cell is each in 8bit positions represent, and can customize, as highest order can represent SCelll, or, lowest order can Represent SCelll.For example, it is assumed that cell determining device 21 be UEl determine one or more dispatch service cells be PCell, SCelll and SCell3, then information transmitting apparatus 22 send physical layer control signaling to UE1, wherein, physical layer control letter The configured information that order includes one or more of dispatch service cells increases message bit pattern " 11010000 " such as in DCI, its In, highest order represents PCell in the 8bit positions, and 7bit positions represent SCell1, and 5bit positions represent SCell3.

Those skilled in the art will be understood that the representation of the configured information of above-mentioned dispatch service cell is only for example, its He is such as applicable to the present invention at the representation of the configured information of dispatch service cell that is existing or being likely to occur from now on, also should Within the scope of the present invention, and it is incorporated herein by reference herein.

Correspondingly, the first signaling reception device 11 of user equipment 1 comes from eNB by mobile network such as TD-LTE, reception Physical layer control signaling, wherein, the physical layer control signaling includes determined based on carrier aggregation one or more of the eNB The configured information of individual dispatch service cell.

Performs device 12 is searched for according to the configured information, in the dispatch service cell corresponding with the configured information Space search operation is performed, to obtain the Downlink Control Information for corresponding to the dispatch service cell corresponding to the configured information. Here, the Downlink Control Information of the dispatch service cell corresponding to corresponding to the configured information can deposit in scheduling clothes On the PDCCH for cell itself of being engaged in, it may be alternatively located on the PDCCH of other dispatch service cells.For example, connecting example, the first signaling connects The configured information that receiving apparatus 11 receives the physical layer control signaling from base station eNB and included is the message bit pattern in DCI " 11010000 ", i.e. base station eNB are that the serving cell of UE1 scheduling is PCell, SCell1 and SCell3, then search for performs device 12, according to the configured information, serially perform space search operation, such as first in serving cell PCell, SCell1 and SCell3 Space search is carried out in PCell, when by decoding, RNTI descramblings, CRC check etc., whether CRC check mistake, is both needed to Then same space search is carried out in SCell1 and SCell3, if CRC check is correct, it is determined according to DCI length Form, the Downlink Control Information for corresponding to the dispatch service cell corresponding to the configured information that eNB is issued is obtained, that is, is obtained Each self-corresponding DCI of SCell1 and SCell3, for demodulating PDSCH, obtain physical layer data.

Preferably, searching for performs device 12 can also be according to the configured information, in the tune corresponding with the configured information Spend the parallel space search that performs in serving cell to operate, the dispatch service cell corresponding to the configured information is corresponded to acquisition Downlink Control Information.For example, also connecting example, the first signaling reception device 11 receives the physical layer control from base station eNB The configured information that signaling includes is the message bit pattern " 11010000 " in DCI, i.e., base station eNB is that the service of UEl scheduling is small Area is PCell, SCell1 and SCell3, and because PCell relative to SCell1 and SCell3 has limit priority, then search performs Device 12 performs space search operation first in serving cell PCell, solved when by decoding, RNTI according to the configured information Disturb, CRC check etc., whether CRC check mistake or not, be both needed to then can be performed in parallel space in SCell1 and SCell3 searches Rope operates, i.e., performs space search operation in serving cell SCell1 and SCell3 simultaneously, passes through decoding, RNTI descramblings, CRC Verification etc., acquisition CRC check quickly is correct, then determines its form according to DCI length, that is, obtains eNB and issue corresponding to institute State the Downlink Control Information of the dispatch service cell corresponding to configured information.

Those skilled in the art will be understood that the mode of above-mentioned execution space search operation is only for example, other it is existing or The mode for the execution space search operation being likely to occur from now on is such as applicable to the present invention, should also be included in the scope of the present invention Within, and be incorporated herein by reference herein.

Constantly worked between user equipment 1 and each device of eNB base stations 2.Specifically, eNB base stations 2 is small Area's determining device 21 is persistently based on carrier aggregation, and one or more dispatch service cells are determined for user equipment 1；First signaling is sent out Device 22 is sent to continue to send physical layer control signaling to the user equipment 1, wherein, the physical layer control signaling includes described The configured information of one or more dispatch service cells；Correspondingly, the first signaling reception device 11 of user equipment 1 persistently receives Physical layer control signaling from eNB, wherein, the physical layer control signaling includes what the eNB was determined based on carrier aggregation The configured information of one or more dispatch service cells；Performs device 12 is searched for continue according to the configured information, with it is described Space search operation is performed in the corresponding dispatch service cell of configured information, is corresponded to obtaining corresponding to the configured information Dispatch service cell Downlink Control Information.It will be understood by those skilled in the art that " lasting " refers to user equipment 1 and eNB base stations 2 each device is constantly scheduled the determination of serving cell, the transmission of physical layer control signaling and reception and space search respectively The execution of operation, until eNB base stations 2 stop the determination of dispatch service cell in a long time.

Preferably, the first signaling reception device 11 of user equipment 1 can also receive the physical layer control from the eNB first Signaling processed；Then space search is carried out in one or more activates serving cell, to parse the physical layer control signaling, obtained One or more of dispatch service cells that the eNB that obtaining the physical layer control signaling includes is determined based on carrier aggregation Configured information, wherein, one or more of dispatch service cells are included in one or more of activation serving cells；Its In, search performs device 12 continues according to the configured information in the dispatch service cell relays corresponding with the configured information The space search operation is performed, to obtain the descending control letter for corresponding to the dispatch service cell corresponding to the configured information Breath.

For example, it is assumed that UE1 sends RRC to base station eNB establishes connection request, base station eNB is according to current schedulable resource Information, the interference information of the one or more cells adjacent with base station, down channel relevant information (such as channel matter of user equipment Amount and other information such as network condition of influence channel quality etc.) etc., it is defined as the RRC parameters that UE1 is configured, such as CRNTI, currently Whether comprising CFI etc. in configurable configuration service cell, DCI, and the RRC parameters are sent to UE1, and base station eNB passes through PDCCH sends Downlink Control Information DCI, such as descending resource allocation, HARQ information, Power Control, and base station eNB base to UE1 Message bit pattern in the configured information such as DCI that carrier aggregation is one or more dispatch service cells that UE1 is determined " 11010000 ", i.e. base station eNB are that the serving cell of UE1 scheduling is PCell, SCell1 and SCell3, then the first signaling receives Device 11 will pass through mobile network such as TD-LTE, receive the physical layer control signaling from base station eNB, physical layer control letter Order includes base station eNB for downlink resource information of its distribution etc., if RRC connections are successfully established, base station eNB can according to current Scheduling resource information, the interference information of the one or more cells adjacent with base station, the down channel relevant information of user equipment (such as other information such as network condition of channel quality and influence channel quality) etc., it is defined as the serving cell of UE1 activation, such as Assuming that base station eNB is defined as UE1 activation serving cell such as SCell1, SCell2 and SCell3, then the first signaling reception device 11 Space search is carried out in the activation serving cell SCell1, SCell2 and SCell3, to parse the physical layer control signaling, It is small based on one or more of dispatch services that carrier aggregation determines to obtain the base station eNB that the physical layer control signaling includes The configured information " 11010000 " in area, wherein, one or more of dispatch service cells are included in one or more of sharp Serving cell living, such as assume that the first signaling reception device 11 carries out space search in serving cell SCell1 is activated, and demodulates PDCCH obtains the message bit pattern " 11010000 " in DCI, then the first signaling reception device 11 can know that base station eNB is adjusted for UEl Serving cell PCell, SCell1 and SCell3 are spent, without dispatching SCell2.

Those skilled in the art will be understood that the mode of the above-mentioned acquisition configured information is only for example, other it is existing or The mode for the acquisition configured information being likely to occur from now on is such as applicable to the present invention, should also be included in the scope of the present invention Within, and be incorporated herein by reference herein.

Then, performs device 12 is searched for according to the configured information, in the dispatch service corresponding with the configured information Cell relays are continuous to perform the space search operation, to obtain corresponding to the dispatch service cell corresponding to the configured information Downlink Control Information.For example, connect example, search performs device 12 according to the configured information " 11010000 ", with the instruction The space search operation is continued executing with information corresponding dispatch service cell PCell, SCell1 and SCell3, such as Space search was performed in SCell1, then searches for performs device 12 and space search is first carried out in PCell, when by decoding, RNTI descramblings, CRC check etc., whether CRC check mistake, is required to then to carry out same space in SCell3 to search Rope, if CRC check is correct, its form is determined according to DCI length, it is right that what acquisition eNB was issued corresponds to configured information institute The Downlink Control Information for the dispatch service cell answered, that is, obtain DCI corresponding to SCell3.

Fig. 3 shows the use for being used to determine Downlink Control Information based on carrier aggregation in accordance with a preferred embodiment of the present invention Family equipment and the equipment schematic diagram of eNB base stations.Wherein, user equipment 1 includes the first signaling reception device 11 ', the second signaling connects Receiving apparatus 13 ' and search performs device 12 ', eNB base stations 2 include cell determining device 21 ', the first signaling sending device 22 ', excellent The first signaling sending device 24 ' of level determining device 23 ' and second.Specifically, the cell determining device 21 ' of eNB base stations 2 is based on carrier wave Polymerization, one or more dispatch service cells are determined for user equipment 1；First signaling sending device 22 ' is to the user equipment 1 Physical layer control signaling is sent, wherein, the physical layer control signaling includes the finger of one or more of dispatch service cells Show information；Correspondingly, the first signaling reception device 11 ' of user equipment 1 receives the physical layer control signaling from eNB, wherein, The physical layer control signaling includes the configured information of one or more dispatch service cells based on carrier aggregation, and at least The precedence information of one dispatch service cell；The priority determining device 23 ' of eNB base stations 2 determines at least one described The precedence information of dispatch service cell；Second signaling sending device 24 ' sends MAC layer control signaling to the user equipment 1, Wherein, the MAC layer control signaling includes the precedence information of at least one dispatch service cell；Correspondingly, Yong Hushe Standby 1 the second signaling reception device 13 ' receives the MAC layer control signaling from the eNB2, wherein, the MAC layer control letter Order includes the precedence information of at least one dispatch service cell；Performs device 12 ' is searched for according to the configured information, and With reference to the precedence information, space search operation is performed in the dispatch service cell corresponding with the configured information, with Obtain the Downlink Control Information for corresponding to the dispatch service cell corresponding to the configured information.Here, the first of user equipment 1 Signaling reception device 11 ', the signaling sending device 22 ' of the cell determining device of eNB base stations 2 21 ' and first respectively with user in Fig. 2 The first signaling reception device 11, the content of the signaling sending device 22 of the cell determining device of eNB base stations 2 21 and first of equipment 1 It is same or similar, for simplicity, repeat no more, be incorporated herein by reference.

Specifically, the member carrier number that priority determining device 23 ' can such as be integrated according to current schedulable resource information Amount and its frequency range, the interference information of the one or more cells adjacent with base station, the down channel relevant information of user equipment are (such as Other information such as network condition of channel quality and influence channel quality etc.) etc., determine at least one dispatch service cell Precedence information.Here, the priority information includes, eNB base stations are increased in the mac layer to represent dispatch service cell The control signaling of precedence information, every 4 bit represent a dispatch service cell, as Ox01234fff represents PCell priority Highest, SCell1 priority are taken second place, and SCell4 priority is minimum, wherein, the bit positions for not containing priority may be configured as " 1 ", or, such as Ox1234ffff expressions SCell1 highest priority, SCell2 priority is taken second place, SCell4 priority It is minimum.For example, it is assumed that cell determining device 21 ' is based on carrier aggregation, it is defined as UE2 scheduling main plot PCell and 4 secondary cells Such as SCell1/SCell2/SCell3/SCell4, then priority determining device 23 ' is according to the adjacent one or more cells in base station Interference information, determine PCell the and SCell1/SCell2/SCell3/SCell4 priority orders of dispatch service cell successively For PCell, SCell1, SCell2, SCell3, SCell4, as shown in Figure 4.

Those skilled in the art will be understood that the representation of above-mentioned precedence information is only for example, and other are existing or modern The representation for the precedence information being likely to occur afterwards is such as applicable to the present invention, also should be included in the scope of the present invention with It is interior, and be incorporated herein by reference herein.

Those skilled in the art will be understood that the mode of the precedence information of the above-mentioned determination dispatch service cell is only Citing, the mode of the precedence information of dispatch service cell is for example applicable described in other existing or determinations for being likely to occur from now on In the present invention, should also be included within the scope of the present invention, and be incorporated herein by reference herein.

Then, the second signaling sending device 24 ' sends MAC layer by mobile network such as TD-LTE to the user equipment Control signaling, wherein, the MAC layer control signaling includes the precedence information of at least one dispatch service cell.For example, Example is connected, the second signaling sending device 22 ' is small including at least one dispatch service to the MAC layer control signaling that UE1 is sent The precedence information in area, such as increased precedence information Ox01234fff for representing dispatch service cell control in the mac layer Signaling.

Correspondingly, the second signaling reception device 13 ' of user equipment 1 comes from eNB by mobile network such as TD-LTE, reception MAC layer control signaling, wherein, the priority of the MAC layer control signaling including at least one dispatch service cell is believed Breath.

Then, search for performs device 12 ' according to the configured information, and with reference to the precedence information, with the finger Show and space search operation is performed in the corresponding dispatch service cell of information, corresponded to obtaining corresponding to the configured information The Downlink Control Information of dispatch service cell.For example, connecting example, search performs device 12 ' is according to the first signaling reception device 11 ' The base station eNB that the physical layer control signaling received includes is the configured information that UE1 determines dispatch service cell Such as " 11111000 ", and with reference to the second signaling reception device 13 ' priority that the MAC layer signaling received includes Information such as Ox01234fff, space search is carried out in the dispatch service cell such as PCell of highest priority first, solved when passing through Code, RNTI descramblings, CRC check etc., whether CRC check mistake or not, the dispatch service then then taken second place in priority is small Space search is carried out in area SCell1, by that analogy, is finally obtained and corresponded to corresponding to the configured information with prestissimo The Downlink Control Information of dispatch service cell, reduce the loss of power and the time loss of user equipment.

Fig. 5 shows that user equipment according to a further aspect of the present invention and eNB base stations coordinate for true based on carrier aggregation Determine the method flow diagram of Downlink Control Information.

Specifically, in step sl, eNB base stations 2 are based on carrier aggregation, and one or more scheduling are determined for user equipment 1 Serving cell；In step s 2, eNB base stations 2 send physical layer control signaling to the user equipment 1, wherein, the physical layer Control signaling includes the configured information of one or more of dispatch service cells；Correspondingly, user equipment 1 receives and comes from eNB Physical layer control signaling, wherein, the physical layer control signaling includes determined based on carrier aggregation one or more of the eNB The configured information of individual dispatch service cell；In step s3, user equipment 1 is believed according to the configured information with the instruction Space search operation is performed in dispatch service cell corresponding to manner of breathing, to obtain corresponding to the scheduling corresponding to the configured information The Downlink Control Information of serving cell.

Here, the user equipment refers in a mobile communication device, terminate from or deliver to being wirelessly transferred for network, and The ability of terminal device is fitted to the equipment of the part being wirelessly transferred, i.e. user's access to mobile network, it includes but is not limited to Any one can carry out man-machine interaction by keyboard, touch pad or voice-operated device with user and can pass through mobile network and base station Carry out the mutual transmission of signal and receive to reach the electronic product of the transmission of mobile communication signal, such as tablet personal computer, intelligence Mobile phone, PDA, vehicle-mounted computer etc..Here, the eNB base stations refer in GSM, be connected part and radio section Point, and the equipment being connected with mobile station is wirelessly transferred by aerial.Here, the mobile network include but is not limited to GSM, 3G, TD-LTE, Wi-Fi, WiMax, WCDMA, CDMA2000, TD-SCDMA, HSPA, LTD etc..Those skilled in the art should be able to manage Above-mentioned user equipment, eNB base stations and mobile network is solved to be only for example, other existing or user equipmenies for being likely to occur from now on or Base station or mobile network are such as applicable to the present invention, should also be included within the scope of the present invention, and herein by reference It is incorporated herein.

Specifically, in step sl, eNB base stations 2 are based on carrier aggregation, can such as may be used according to current schedulable resource information Under the member carrier quantity and its frequency range of integration, the interference information of one or more cells adjacent with base station, user equipment Under row channel related information (such as other information such as network condition of channel quality and influence channel quality), user equipment Row data amount information etc., one or more dispatch service cells are determined for user equipment 1.Here, the serving cell include but It is not limited to such as PCell, SCell.For example, it is assumed that after UE1 is connected by PCell with base station eNB completion RRC, base station eNB root Little according to downlink data amount of the UE1 relevant information as judged UE1, then in step sl, eNB base stations 2 are based on carrier aggregation, really It is set to UE1 and dispatches 1 secondary cell SCell1；If base station eNB according to UE2 relevant information as judge UE2 downlink data amount compared with Greatly, i.e. the PCell loads of UE2 are higher, then in step sl, eNB base stations 2 are based on carrier aggregation, and it is auxiliary to be defined as UE2 scheduling 4 Cell such as SCell1/SCell2/SCell3/SCell4.

Those skilled in the art will be understood that the above-mentioned mode that one or more dispatch service cells are determined for user equipment It is only for example, other modes that one or more dispatch service cells are determined for user equipment that are existing or being likely to occur from now on The present invention is such as applicable to, should be also included within the scope of the present invention, and be incorporated herein by reference herein.

Preferably, in step sl, eNB base stations 2 can also update auxiliary first with activation/deactivation MAC Control Element The state of activation of cell；Then, then based on carrier aggregation, the assisted cell after being updated to state of activation is scheduled, to determine The one or more of dispatch service cells corresponding with the user equipment.For example, it is assumed that base station eNB is according under UE1 Row channel quality, which is defined as it, dispatches main plot PCell and 2 secondary cell such as SCell1/SCell2, wherein, SCell2 is to deactivate State living, and in step sl, eNB base stations 2 find UE1 base station eNB for the activation serving cell such as PCell of its scheduling and SCell1 can not meet its existing data transfer, then in step sl, eNB base stations 2 are controlled first with activation/deactivation MAC Unit processed, assisted cell SCell2 is updated to state of activation by deactivation status；Then, in step sl, eNB base stations 2 are again Based on carrier aggregation, the assisted cell after being updated to state of activation is scheduled, and is defined as UE1 scheduling main plot PCell and 2 Secondary cell such as SCell1/SCell2.For another example, it is assumed that base station eNB is defined as it according to UE2 down channel quality dispatches main plot PCell and 4 secondary cell such as SCell1/SCell2/SCell3/SCell4, and in step sl, eNB base stations 2 find that UE2 exists Base station eNB does not have data transfer in the activation serving cell such as SCell4 for its scheduling within a period of time, then in step S1 In, assisted cell SCell4 is updated to by eNB base stations 2 first with activation/deactivation MAC Control Element by state of activation Deactivation status；Then, in step sl, eNB base stations 2 are based on carrier aggregation again, the assisted cell after being updated to state of activation It is scheduled, is defined as UE2 scheduling main plot PCell and 3 secondary cell such as SCelll/SCell2/SCell3.

Those skilled in the art will be understood that the mode of the state of activation of above-mentioned renewal assisted cell is only for example, and other are existing The mode of the state of activation of renewal assisted cell that is having or being likely to occur from now on is such as applicable to the present invention, should also be included in this Within invention protection domain, and it is incorporated herein by reference herein.

In step s 2, eNB base stations 2 pass through mobile network such as TD-LTE (timesharing Long Term Evolution, Time Division Long Term Evolution), physical layer control signaling is sent to the user equipment, wherein, the physical layer control signaling Include the configured information of one or more of dispatch service cells.Here, the physical layer control signaling is used for instruction user The resource allocation of equipment and other control information, it includes but is not limited to such as DCI (Downlink ControlInfornation) Signaling.Here, the configured information is included in the bitmap of the increased serving cell for being used to represent that eNB is UE scheduling in DCI (bitmap) information, as the message bit pattern is represented with 8bit, every bit positions represent a serving cell, every in the 8bit positions Which serving cell is one represent, and can customize, as highest order can represent SCell1, or, lowest order can represent SCell1.Example Such as, it is assumed that in step sl, eNB base stations 2 be UE1 determine one or more dispatch service cells be PCell, SCell1 and SCell3, then in step s 2, eNB base stations 2 send physical layer control signaling to UE1, wherein, the physical layer control signaling bag Include the configured information of one or more of dispatch service cells increases message bit pattern " 11010000 " such as in DCI, wherein, should Highest order represents PCell in 8bit positions, and 7bit positions represent SCell1, and 5bit positions represent SCell3.

Those skilled in the art will be understood that the representation of the configured information of above-mentioned dispatch service cell is only for example, its He is such as applicable to the present invention at the representation of the configured information of dispatch service cell that is existing or being likely to occur from now on, also should Within the scope of the present invention, and it is incorporated herein by reference herein.

Correspondingly, user equipment 1 receives the physical layer control signaling from eNB by mobile network such as TD-LTE, its In, the physical layer control signaling includes the finger for one or more dispatch service cells that the eNB is determined based on carrier aggregation Show information.

In step s3, user equipment 1 is according to the configured information, in the dispatch service corresponding with the configured information Space search operation is performed in cell, to obtain the descending control for corresponding to the dispatch service cell corresponding to the configured information Information.Here, the Downlink Control Information of the dispatch service cell corresponding to corresponding to the configured information can deposit in this On the dispatch service cell PDCCH of itself, it may be alternatively located on the PDCCH of other dispatch service cells.For example, example is connected, in step In rapid S2, the configured information that user equipment 1 receives the physical layer control signaling from base station eNB and included is in DCI Message bit pattern " 11010000 ", i.e. base station eNB are that the serving cell of UE1 scheduling is PCell, SCelll and SCell3, then in step In rapid S3, user equipment 1 serially performs space according to the configured information in serving cell PCell, SCell1 and SCell3 Search operation, space search is first such as carried out in PCell, when by decoding, RNTI descramblings, CRC check etc., regardless of CRC check Whether mistake to be, is required to then carry out same space search in SCell1 and SCell3, if CRC check is correct, basis DCI length determines its form, obtains the descending control for corresponding to the dispatch service cell corresponding to the configured information that eNB is issued Information processed, that is, each self-corresponding DCI of SCell1 and SCell3 are obtained, for demodulating PDSCH, obtain physical layer data.

Preferably, in step s3, user equipment 1 can also be according to the configured information, relative with the configured information Space search operation is performed in the dispatch service cell answered parallel, is taken with obtaining the scheduling corresponded to corresponding to the configured information The Downlink Control Information for cell of being engaged in.For example, also connecting example, in step s 2, user equipment 1 receives the thing from base station eNB The configured information that reason layer control signaling includes is the message bit pattern " 11010000 " in DCI, i.e. base station eNB is dispatched for UE1 Serving cell be PCell, SCell1 and SCell3, because PCell relative to SCell1 and SCell3 has limit priority, then In step s3, user equipment 1 performs space search operation, when logical according to the configured information first in serving cell PCell Decoding, RNTI descramblings, CRC check etc. are crossed, whether CRC check mistake or not, being both needed to then can be in SCell1 and SCell3 simultaneously Space search operation is performed capablely, i.e., performs space search operation in serving cell SCell1 and SCell3 simultaneously, pass through solution Code, RNTI descramblings, CRC check etc., acquisition CRC check quickly is correct, then determines its form according to DCI length, that is, obtains ENB issues the Downlink Control Information corresponding to the dispatch service cell corresponding to the configured information.

Those skilled in the art will be understood that the mode of above-mentioned execution space search operation is only for example, other it is existing or The mode for the execution space search operation being likely to occur from now on is such as applicable to the present invention, should also be included in the scope of the present invention Within, and be incorporated herein by reference herein.

Constantly worked between user equipment 1 and each step of eNB base stations 2.Specifically, in step sl, ENB base stations 2 are persistently based on carrier aggregation, and one or more dispatch service cells are determined for user equipment 1；In step s 2, eNB Base station 2 continues to send physical layer control signaling to the user equipment 1, wherein, the physical layer control signaling includes described one The configured information of individual or multiple dispatch service cells；Correspondingly, physical layer control of the lasting reception of user equipment 1 from eNB Signaling, wherein, it is small based on one or more dispatch services that carrier aggregation determines that the physical layer control signaling includes the eNB The configured information in area；In step s3, user equipment 1 continues according to the configured information, corresponding with the configured information Dispatch service cell in perform space search operation, with obtain correspond to the configured information corresponding to dispatch service cell Downlink Control Information.It will be understood by those skilled in the art that " lasting " refers to each step difference of user equipment 1 and eNB base stations 2 The determination of serving cell, the transmission of physical layer control signaling and the execution received and space search operates are constantly scheduled, directly Stop the determination of dispatch service cell in a long time to eNB base stations 2.

Preferably, in step s 2, user equipment 1 can also receive the physical layer control signaling from the eNB first；So Space search is carried out in one or more activates serving cell afterwards, to parse the physical layer control signaling, obtains the thing The instruction letter for one or more of dispatch service cells that the eNB that reason layer control signaling includes is determined based on carrier aggregation Breath, wherein, one or more of dispatch service cells are included in one or more of activation serving cells；Wherein, in step In rapid S3, user equipment 1 continues in the dispatch service cell relays corresponding with the configured information and held according to the configured information The row space search operation, to obtain the descending control letter for corresponding to the dispatch service cell corresponding to the configured information Breath.

For example, it is assumed that UE1 sends RRC to base station eNB establishes connection request, base station eNB is according to current schedulable resource Information, the interference information of the one or more cells adjacent with base station, down channel relevant information (such as channel matter of user equipment Amount and other information such as network condition of influence channel quality etc.) etc., it is defined as the RRC parameters that UE1 is configured, such as CRNTI, currently Whether comprising CFI etc. in configurable configuration service cell, DCI, and the RRC parameters are sent to UE1, and base station eNB passes through PDCCH sends Downlink Control Information DCI, such as descending resource allocation, HARQ information, Power Control, and base station eNB base to UE1 Message bit pattern in the configured information such as DCI that carrier aggregation is one or more dispatch service cells that UE1 is determined " 11010000 ", i.e. base station eNB are that the serving cell of UE1 scheduling is PCell, SCell1 and SCell3, then in step s 2, use Family equipment 1 will pass through mobile network such as TD-LTE, receive the physical layer control signaling from base station eNB, physical layer control Signaling includes the downlink resource information etc. of base station eNB for its distribution, if RRC connections are successfully established, base station eNB is according to currently Schedulable resource information, the interference information of the one or more cells adjacent to base station, the down channel of user equipment are related to be believed Breath (such as other information such as network condition of channel quality and influence channel quality) etc., it is defined as the serving cell of UE1 activation, Such as assume that base station eNB is defined as UE1 activation serving cell such as SCell1, SCell2 and SCell3, then the first signaling reception device 11 carry out space search in the activation serving cell SCell1, SCell2 and SCell3, to parse the physical layer control letter Order, one or more of scheduling clothes that the base station eNB that obtaining the physical layer control signaling includes is determined based on carrier aggregation The configured information " 11010000 " for cell of being engaged in, wherein, one or more of dispatch service cells are included in one or more Individual activation serving cell, such as assume that user equipment 1 carries out space search in serving cell SCell1 is activated in step s 2, Demodulation PDCCH obtains the message bit pattern " 11010000 " in DCI, then in step s 2, user equipment 1 can know base station eNB Serving cell PCell, SCell1 and SCell3 are scheduled for UEl, without dispatching SCell2.

Those skilled in the art will be understood that the mode of the above-mentioned acquisition configured information is only for example, other it is existing or The mode for the acquisition configured information being likely to occur from now on is such as applicable to the present invention, should also be included in the scope of the present invention Within, and be incorporated herein by reference herein.

Then, in step s3, user equipment 1 is according to the configured information, in the tune corresponding with the configured information The space search operation is continued executing with degree serving cell, to obtain corresponding to the dispatch service corresponding to the configured information The Downlink Control Information of cell.For example, connecting example, in step s3, user equipment 1 is according to the configured information " 11010000 ", institute is continued executing with dispatch service cell PCell, SCell1 and SCell3 corresponding with the configured information Space search operation is stated, space search was such as performed in SCell1, then in step s3, user equipment 1 is first in PCell Middle carry out space search, when by decoding, RNTI descramblings, CRC check etc., whether CRC check mistake, is required to then exist Same space search is carried out in SCell3, if CRC check is correct, its form is determined according to DCI length, eNB is obtained and issues Correspond to the configured information corresponding to dispatch service cell Downlink Control Information, that is, obtain SCell3 corresponding to DCI.

Fig. 6 shows that user equipment in accordance with a preferred embodiment of the present invention and eNB base stations are coordinated for being gathered based on carrier wave Close the method flow diagram for determining Downlink Control Information.

Specifically, in step S1 ', eNB base stations 2 are based on carrier aggregation, and one or more scheduling are determined for user equipment Serving cell；In step S2 ', eNB base stations 2 send physical layer control signaling to the user equipment 1, wherein, the physics Layer control signaling includes the configured information of one or more of dispatch service cells；Correspondingly, user equipment 1 is received and come from ENB physical layer control signaling, wherein, the physical layer control signaling includes one or more scheduling clothes based on carrier aggregation The configured information for cell of being engaged in；In step S4 ', eNB base stations 2 determine the priority letter of at least one dispatch service cell Breath；In step S5 ', eNB base stations 2 send MAC layer control signaling to the user equipment, wherein, the MAC layer control signaling Include the precedence information of at least one dispatch service cell；Accordingly, user equipment 1 then comes from the eNB base stations 2 MAC layer control signaling is sent to the user equipment, wherein, the MAC layer control signaling includes at least one scheduling clothes The precedence information for cell of being engaged in；In step S3 ', user equipment 1 is believed according to the configured information, and with reference to the priority Breath, performs space search operation in the dispatch service cell corresponding with the configured information, corresponds to the finger to obtain Show the Downlink Control Information of the dispatch service cell corresponding to information.Here, step S1 ', step S2 ' respectively with step in Fig. 3 S1, step S2 content are same or similar, for simplicity, repeat no more, are incorporated herein by reference.

Specifically, in step S4 ', member carrier that eNB base stations 2 can such as be integrated according to current schedulable resource information Quantity and its frequency range, the interference information of the one or more cells adjacent with base station, the down channel relevant information of user equipment (such as other information such as network condition of channel quality and influence channel quality) etc., determines that at least one dispatch service is small The precedence information in area.Here, the priority information includes eNB base stations increased expression dispatch service cell in the mac layer Precedence information control signaling, every 4 bit represent a dispatch service cell, as Ox01234fff represents that PCell's is preferential Level highest, SCell1 priority are taken second place, and SCell4 priority is minimum, wherein, the bit positions for not containing priority may be configured as " 1 ", or, such as Ox1234ffff expressions SCell1 highest priority, SCell2 priority is taken second place, SCell4 priority It is minimum.For example, it is assumed that in step S1 ', eNB base stations 2 are based on carrier aggregation, are defined as UE2 scheduling main plot PCell and 4 Secondary cell such as SCell1/SCell2/SCell3/SCell4, then in step S4 ', eNB base stations 2 are according to adjacent one in base station Or the interference information of multiple cells, determine that the PCell and SCelll/SCell2/SCell3/SCell4 of dispatch service cell are preferential Level order is followed successively by PCell, SCell1, SCell2, SCell3, SCell4, as shown in Figure 4.

Those skilled in the art will be understood that the representation of above-mentioned precedence information is only for example, and other are existing or modern The representation for the precedence information being likely to occur afterwards is such as applicable to the present invention, also should be included in the scope of the present invention with It is interior, and be incorporated herein by reference herein.

Those skilled in the art will be understood that the mode of the precedence information of the above-mentioned determination dispatch service cell is only Citing, the mode of the precedence information of dispatch service cell is for example applicable described in other existing or determinations for being likely to occur from now on In the present invention, should also be included within the scope of the present invention, and be incorporated herein by reference herein.

Then, in step S5 ', eNB base stations 2 send MAC layer by mobile network such as TD-LTE to the user equipment Control signaling, wherein, the MAC layer control signaling includes the precedence information of at least one dispatch service cell.For example, Example is connected, in step S5 ', eNB base stations 2 are small including at least one dispatch service to the MAC layer control signaling that UE1 is sent The precedence information in area, such as increased precedence information Ox01234fff for representing dispatch service cell control in the mac layer Signaling.

Correspondingly, user equipment 1 receives the MAC layer control signaling from eNB by mobile network such as TD-LTE, wherein, The MAC layer control signaling includes the precedence information of at least one dispatch service cell.

Then, in step S3 ', user equipment 1 is according to the configured information, and with reference to the precedence information, with Space search operation is performed in the corresponding dispatch service cell of the configured information, corresponds to the configured information institute to obtain The Downlink Control Information of corresponding dispatch service cell.For example, connecting example, in step S3 ', user equipment 1 is according to it in step The base station eNB that the physical layer control signaling received in rapid S2 ' includes is the finger that UE1 determines dispatch service cell Show information such as " 11111000 ", and the priority included with reference to its described MAC layer signaling received in step S5 ' Information such as Ox01234fff, space search is carried out in the dispatch service cell such as PCell of highest priority first, solved when passing through Code, RNTI descramblings, CRC check etc., whether CRC check mistake or not, the dispatch service then then taken second place in priority is small Space search is carried out in area SCell1, by that analogy, is finally obtained and corresponded to corresponding to the configured information with prestissimo The Downlink Control Information of dispatch service cell, reduce the loss of power and the time loss of user equipment.

It should be noted that the present invention can be carried out in the assembly of software and/or software and hardware, for example, can adopt With application specific integrated circuit (ASIC), general purpose computer or any other realized similar to hardware device.In one embodiment In, software program of the invention can realize steps described above or function by computing device.Similarly, it is of the invention Software program (including related data structure) can be stored in computer readable recording medium storing program for performing, for example, RAM memory, Magnetically or optically driver or floppy disc and similar devices.In addition, some steps or function of the present invention can employ hardware to realize, example Such as, coordinate as with processor so as to perform the circuit of each step or function.

In addition, the part of the present invention can be applied to computer program product, such as computer program instructions, when its quilt When computer performs, by the operation of the computer, the method according to the invention and/or technical scheme can be called or provided. And the programmed instruction of the method for the present invention is called, it is possibly stored in fixed or moveable recording medium, and/or pass through Broadcast or the data flow in other signal bearing medias and be transmitted, and/or be stored according to described program instruction operation In the working storage of computer equipment.Here, including a device according to one embodiment of present invention, the device includes using Memory in storage computer program instructions and processor for execute program instructions, wherein, when the computer program refers to When order is by the computing device, method and/or skill of the plant running based on foregoing multiple embodiments according to the present invention are triggered Art scheme.

It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.This Outside, it is clear that the word of " comprising " one is not excluded for other units or step, and odd number is not excluded for plural number.That is stated in device claim is multiple Unit or device can also be realized by a unit or device by software or hardware.The first, the second grade word is used for table Show title, and be not offered as any specific order.

Claims (7)

1. a kind of method for being used to determine Downlink Control Information based on carrier aggregation at user equipment end, wherein, this method includes Following steps：

A receives the physical layer control signaling from eNB, wherein, the physical layer control signaling is gathered including the eNB based on carrier wave Close the configured information of the one or more dispatch service cells determined；

- the MAC layer control signaling from the eNB is received, wherein, the MAC layer control signaling includes at least one tune Spend the precedence information of serving cell；

B is according to the configured information, small in the dispatch service corresponding with the configured information and with reference to the precedence information Space search operation is performed in area, to obtain the descending control letter for corresponding to the dispatch service cell corresponding to the configured information Breath.

2. according to the method for claim 1, wherein, the step b includes：

- according to the configured information, and with reference to the precedence information, it is small in the dispatch service corresponding with the configured information Space search operation is performed in area parallel, to obtain the descending control for corresponding to the dispatch service cell corresponding to the configured information Information processed.

3. method according to claim 1 or 2, wherein, the step a includes：

- receive the physical layer control signaling from the eNB；

- space search is carried out in one or more activates serving cells, to parse the physical layer control signaling, described in acquisition The instruction for one or more of dispatch service cells that the eNB that physical layer control signaling includes is determined based on carrier aggregation Information, wherein, one or more of dispatch service cells are included in one or more of activation serving cells；

Wherein, the step b includes：

- according to the configured information, and with reference to the precedence information, it is small in the dispatch service corresponding with the configured information The space search operation is continued executing with area, is corresponded to obtaining under the dispatch service cell corresponding to the configured information Row control information.

4. a kind of user equipment for being used to determine Downlink Control Information based on carrier aggregation, wherein, the user equipment includes：

First signaling reception device, for receiving the physical layer control signaling from eNB, wherein, the physical layer control signaling Include the configured information of the eNB one or more dispatch service cells determined based on carrier aggregation；

Second signaling reception device, for receiving the MAC layer control signaling from the eNB, wherein, the MAC layer control letter Order includes the precedence information of at least one dispatch service cell；

Search for performs device, for according to the configured information, and with reference to the precedence information, with the configured information phase Space search operation is performed in corresponding dispatch service cell, to obtain corresponding to the dispatch service corresponding to the configured information The Downlink Control Information of cell.

5. user equipment according to claim 4, wherein, the search performs device is used for：

- according to the configured information, and with reference to the precedence information, it is small in the dispatch service corresponding with the configured information Space search operation is performed in area parallel, to obtain the descending control for corresponding to the dispatch service cell corresponding to the configured information Information processed.

6. the user equipment according to claim 4 or 5, wherein, the first signaling reception device is used for：

- receive the physical layer control signaling from the eNB；

- space search is carried out in one or more activates serving cells, to parse the physical layer control signaling, described in acquisition The instruction for one or more of dispatch service cells that the eNB that physical layer control signaling includes is determined based on carrier aggregation Information, wherein, one or more of dispatch service cells are included in one or more of activation serving cells；

Wherein, the search performs device is used for：

- according to the configured information, and with reference to the precedence information, it is small in the dispatch service corresponding with the configured information The space search operation is continued executing with area, is corresponded to obtaining under the dispatch service cell corresponding to the configured information Row control information.

7. a kind of communication system, wherein, the communication system is included comprising according at least any one in claim 4 to 6 User equipment.