CN102438247B - Physical Cell Identifier distributes and acquisition methods, base station and user equipment - Google Patents

Physical Cell Identifier distributes and acquisition methods, base station and user equipment Download PDF

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Publication number
CN102438247B
CN102438247B CN201110343600.4A CN201110343600A CN102438247B CN 102438247 B CN102438247 B CN 102438247B CN 201110343600 A CN201110343600 A CN 201110343600A CN 102438247 B CN102438247 B CN 102438247B
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component carrier
base station
cell identifier
physical cell
predetermined threshold
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CN102438247A (en
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魏巍
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Yangxin Zhongrui Technology Innovation Co., Ltd
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ZTE Corp
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Priority to PCT/CN2012/072913 priority patent/WO2013063896A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]

Abstract

The present invention provides Physical Cell Identifier distribution, acquisition methods, base station and user equipment, for solving the problems, such as Physical Cell Identifier distribution in carrier aggregation system.Wherein, Physical Cell Identifier distribution method includes：The component carrier of all polymerizations is divided into for the first component carrier of bearer control signalling for base station and the second component carrier for carrying data transmission；Base station is that the first component carrier and the second component carrier distribute public Physical Cell Identifier；And base station obtains the link performance parameters value of user terminal；Physical Cell Identifier is redistributed when it is determined that link performance parameters value exceeds the first predetermined threshold value, for the first component carrier and/or the second component carrier in base station.Using technical scheme provided by the invention, single the defects of inter-cell interference is increased using public Physical Cell Identifier and single the defects of channel performance is reduced using different Physical Cell Identifier can be overcome.

Description

Physical Cell Identifier distributes and acquisition methods, base station and user equipment
Technical field
The invention belongs to the communications field, is related to Physical Cell Identifier distribution method in carrier aggregation system, more specifically, relates to And a kind of Physical Cell Identifier distribution, acquisition methods, base station and user equipment.
Background technology
In follow-on broadband wireless communication network, how solve in cordless communication network in current radio communication system Support bigger bandwidth turns into improve inter-cell user terminal throughput and user terminal average throughput under bandwidth in system One key factor is simultaneously faced with formidable challenges.
At present, in the long-term technology evolution (Long Term Evolution, LTE) of third generation partner program all It is proposed effectively to support bigger bandwidth in current wireless communication system by the way of carrier aggregation, to meet new one For in wireless standard to the demand of the indexs such as handling capacity, peak rate.Carrier aggregation is supported more in future broadband wireless communication systems The key technology of big bandwidth, by polymerizeing to different carrier waves, the carrier wave of bigger bandwidth is formed, in bandwidth after polymerisation The user terminal (User Equipment, UE) with stronger ability is supported, for example, advanced long-term evolution system (LTE- Advanced 100MHz bandwidth is exceeded in).
A key issue is the distribution of the Physical Cell Identifier on the component carrier of all polymerizations in carrier aggregation system, Distribution method can use the public Physical Cell Identifier of all component carriers or different Physical Cell Identifier.Public physics is small Area's mark makes have identical downlink public reference signal (Common Reference in all downlink component carriers Signal, CRS), synchronizing signal and scrambler, so as to increase the cubic measure of down link signal (CM, Cubic Metric) and Peak-to-average power ratio (Peak to Average Power Ratio, PAPR), and then increase the interference of minizone；Different physics Cell ID can cause the different around uplink demodulation reference signal (DeModulation of corresponding up-link component carrier Reference Signal, DMRS), Sounding reference symbols (Sounding Reference Signal, SRS) sequence and Different physical uplink link shared channels (Physical Uplink Shared Channel, PUSCH) frequency patterns, due to Signal in orthogonal can lose because of different root sequences, so that uplink performance, such as, channel estimation, channel Sounding To seriously it reduce.
Therefore, in the prior art, exist increase inter-cell interference that the public Physical Cell Identifier of single use brings and The problem of link performance reduces caused by the different Physical Cell Identifier of single use.
The content of the invention
The present invention provides a kind of Physical Cell Identifier distribution, acquisition methods, base station and user equipment, for solving existing skill The public Physical Cell Identifier of single use is brought in art the increase inter-cell interference Physical Cell Identifier different with single use Caused by link performance reduce the problem of.
To realize the above-mentioned purpose of the present invention, according to the first aspect of the invention, there is provided a kind of Physical Cell Identifier point Method of completing the square, and employ following technical scheme：
Physical Cell Identifier distribution method, in carrier aggregation system, including：Base station is by the component carrier of all polymerizations The second component carrier for being divided into for the first component carrier of bearer control signalling and being sent for carrying data；Base station is first Component carrier and the second component carrier distribute public Physical Cell Identifier；Base station obtains the link performance parameters value of user terminal； And base station is when it is determined that link performance parameters value exceeds the first predetermined threshold value, is that the first component carrier and/or the second composition carry Ripple redistributes Physical Cell Identifier.
Further, base station is that the first component carrier and the second component carrier distribute public Physical Cell Identifier and included： Base station is shifted by circulation time or phaseshift step size produces all public Physical Cell Identifier, and by caused public physics Cell ID distributes to the first component carrier and the second component carrier.
Further, parameter value base station is when it is determined that parameter value link performance parameters value exceeds the first predetermined threshold value, for ginseng The component carrier of numerical value first and/or the component carrier of parameter value second are redistributed Physical Cell Identifier and included：Parameter value base station exists Determine the link performance parameters value of the component carrier of parameter value first without departing from the predetermined threshold value of parameter value first, down link signal Cubic measure and peak-to-average power ratio surpass beyond the link performance parameters value of the second predetermined threshold value and the component carrier of parameter value second When going out the first predetermined threshold value of parameter value, the physics different from the component carrier of parameter value first is distributed for the component carrier of parameter value second Cell ID.
Further, parameter value base station is when it is determined that parameter value link performance parameters value exceeds the first predetermined threshold value, for ginseng The component carrier of numerical value first and/or the component carrier of parameter value second are redistributed Physical Cell Identifier and included：Parameter value base station exists Determine that the link performance parameters value of the component carrier of parameter value first exceeds second group of the predetermined threshold value of parameter value first and parameter value Into carrier wave link performance parameters value without departing from the first predetermined threshold value of parameter value when, parameter value base station by change parameter value circulate Time shift or component carrier or the component carrier of parameter value first or parameter value second that phaseshift step size is all polymerizations of parameter value Component carrier produces new Physical Cell Identifier.
Further, parameter value base station is when it is determined that parameter value link performance parameters value exceeds the first predetermined threshold value, for ginseng The component carrier of numerical value first and/or the component carrier of parameter value second are redistributed Physical Cell Identifier and included：Parameter value base station exists Determine that the link performance parameters value of the component carrier of parameter value first exceeds second group of the predetermined threshold value of parameter value first and parameter value When exceeding the first predetermined threshold value of parameter value into the link performance parameters value of carrier wave, for the distribution of the component carrier of parameter value second and parameter The different Physical Cell Identifier of the component carrier of value first.
Further, base station is when it is determined that link performance parameters value exceeds the first predetermined threshold value, be the first component carrier and/ Or second component carrier redistribute Physical Cell Identifier and also include：Physical area is being redistributed for the first component carrier in base station During mark, identical Physical Cell Identifier is distributed for each component carrier of the first component carrier；Base station is for second group It is that each component carrier of the second component carrier distributes different physics when redistributing Physical Cell Identifier into carrier wave Cell ID.
Further, Physical Cell Identifier distribution method also includes：First carrier is divided into carrying all control by base station The monitoring control component carrier of signal and the auxiliary control component carrier for carrying component carrier related signaling, wherein, monitoring composition Carrier wave includes a component carrier in first carrier.
According to the second aspect of the invention, there is provided a kind of base station, and use following technical scheme：
Base station includes：Division module, for the component carrier of all polymerizations to be divided into first for bearer control signalling Component carrier and the second component carrier for carrying data transmission；Distribute module, for for the first component carrier and second group Public Physical Cell Identifier is distributed into carrier wave；Acquisition module, the link performance parameters value of user terminal is obtained for base station；And Redistribute module, for base station when it is determined that link performance parameters value exceeds the first predetermined threshold value, be the first component carrier and/ Or second component carrier redistribute Physical Cell Identifier.
Further, distribute module includes：Generation module, is shifted for base station by circulation time or phaseshift step size produces All public Physical Cell Identifier, and caused public Physical Cell Identifier is distributed into the first component carrier and second group Into carrier wave.
Further, redistributing module includes：Submodule is redistributed, the base station is it is determined that first composition carries The link performance parameters value of ripple is big without departing from first predetermined threshold value, the cubic measure of down link signal and peak-to-average power ratio When the second predetermined threshold value and the link performance parameters of second component carrier are also greater than first predetermined threshold value, it is Second component carrier distributes the Physical Cell Identifier different from first component carrier.
Further, redistributing module also includes：Change module, for base station it is determined that the link of the second component carrier When performance parameter value is without departing from the first predetermined threshold value, base station is by changing circulation time displacement or phaseshift step size as all polymerizations Component carrier or the first component carrier or the second component carrier produce new Physical Cell Identifier.
According to the third aspect of the present invention, there is provided a kind of Physical Cell Identifier acquisition methods, and use following technical side Case：
Physical Cell Identifier acquisition methods include：User terminal is obtained and distributed to first using base station for carrying control letter The public Physical Cell Identifier of first component carrier of order and the second component carrier for carrying data transmission；User terminal starts Link performance parameters are measured, and link performance parameters value is fed back into base station；And user terminal obtains base station it is determined that link When energy parameter value exceeds the first predetermined threshold value new physical area is redistributed for the first component carrier and/or the second component carrier Mark.
Further, Physical Cell Identifier acquisition methods also include：User terminal measures the cubic measure of down link signal And peak-to-average power ratio, and by measurement feedback to base station；User terminal obtains base station it is determined that cubic measure and peak-to-average power ratio It is the new Physical Cell Identifier of the second component carrier distribution during beyond the second predetermined threshold value.
Further, the new Physical Cell Identifier that user terminal obtains base station again for user terminal distribution includes：User terminal Receive the indicating bit that base station sends new Physical Cell Identifier；User terminal starts cell searching with selection flow according to instruction Position obtains new Physical Cell Identifier.
According to the fourth aspect of the present invention, there is provided a kind of user equipment, and use following technical scheme：
User equipment includes：First acquisition module, obtain and distributed to first using base station for carrying for user terminal The public Physical Cell Identifier of first component carrier of control signaling and the second component carrier for carrying data transmission；Measurement Module, start link performance parameters measurement for user terminal, and the link performance parameters value measured is fed back into base station；And First redistributes module, and it is the when it is determined that link performance parameters value exceed the first predetermined threshold value to obtain base station for user terminal One component carrier and/or the second component carrier redistribute new Physical Cell Identifier.
Further, user equipment also includes：Feedback module, the cubic measure and peak for user terminal measurement user terminal are equal Power ratio, and by measurement feedback to base station；Second redistributes module, for user terminal obtain base station it is determined that cube Measure the new Physical Cell Identifier redistributed when exceeding the second predetermined threshold value with peak-to-average power ratio for the second component carrier.
As can be seen that the side that the present invention is combined by using public Physical Cell Identifier and different Physical Cell Identifier Method, defect caused by the public Physical Cell Identifier of single use and the different Physical Cell Identifier of single use is avoided, specifically It is that component carrier distributes corresponding Physical Cell Identifier according to the link performance of component carrier in carrier aggregation.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages. Below with reference to figure, the present invention is further detailed explanation.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, forms the part of the application, schematic reality of the invention Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the Physical Cell Identifier distribution method broad flow diagram of the embodiment of the present invention；
Fig. 2 is the particular flow sheet of the Physical Cell Identifier distribution method of the embodiment of the present invention；
Fig. 3 is the primary structure schematic diagram of the base station of the embodiment of the present invention；
Fig. 4 is the broad flow diagram of the Physical Cell Identifier acquisition methods of the embodiment of the present invention；And
Fig. 5 is the primary structure schematic diagram of the user equipment of the embodiment of the present invention.
Embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be defined by the claims Implement with the multitude of different ways of covering.
Fig. 1 is the Physical Cell Identifier distribution method broad flow diagram of the embodiment of the present invention.
Shown in Figure 1, Physical Cell Identifier distribution method includes：
S101：Base station by the component carrier of all polymerizations be divided into for bearer control signalling the first component carrier and be used for Carry the second component carrier that data are sent；
S103：Base station is that the first component carrier and the second component carrier distribute public Physical Cell Identifier；
S105：Base station obtains the link performance parameters value of user terminal；And
S107：Base station is the first component carrier and second when it is determined that link performance parameters value exceeds the first predetermined threshold value Component carrier redistributes Physical Cell Identifier.
In the above-mentioned technical proposal of the present embodiment, the first component carrier is control component carrier, and the second component carrier is Data component carrier.Base station is user terminal definition control component carrier and data component carrier；All control component carriers can To use the public Physical Cell Identifier of identical, whole control signalings is carried；Data component carrier can also use public thing Manage cell ID；Wherein, control component carrier is used for bearer control signalling, such as, CRS, DMRS, SRS, PUSCH, physical down Link control channel, physical control format mark channel, Physical HARQ Indicator Channel etc..Data composition carriers carry user terminal UE Data send.Therefore, because all control component carriers use the public Physical Cell Identifier of identical, so, intercarrier Interference significantly reduce.Base station persistently obtains the path loss and area interference value of user terminal, exceeds in path loss and area interference value During the first predetermined threshold value, Physical Cell Identifier is redistributed for control component carrier and data component carrier.Wherein, first is default Threshold value is set according to specific link performance, and when path loss and area interference value reach first predetermined threshold value, base station is control Component carrier and data component carrier redistribute Physical Cell Identifier, up-link is kept good link Performance.
Preferably, when base station is controls component carrier and data component carrier to redistribute Physical Cell Identifier, for institute Some control component carriers distribute identical Physical Cell Identifier, can so significantly reduce the interference of intercarrier.
Preferably, when base station is controls component carrier and data component carrier to redistribute Physical Cell Identifier, consider To the difference of the environmental condition such as channel estimation, channel Sounding, path loss, interference between different data component carriers, therefore, Different Physical Cell Identifier distribution is distributed for each component carrier of data component carrier, is used not on different carrier waves Same coded modulation scheme, to improve the data transfer performance of user terminal.
Preferably, control component carrier is also divided into monitoring control component carrier and auxiliary control component carrier by base station, its In, monitoring control component carrier one of which is individually composed carrier wave, and carries whole control signals, i.e. CRS, DMRS, SRS, PUSCH, PDCCH, PCFICH, PHICH etc., it can so improve control composition spectrum of carrier utilization rate.Control The remainder of component carrier is referred to as aiding in control component carrier, and auxiliary control component carrier only carries SRS, mixed automatic retransfer Signaling related to component carrier measurement HARQ etc..
Fig. 2 is the particular flow sheet of the Physical Cell Identifier distribution method of the embodiment of the present invention.
Shown in Figure 2, Physical Cell Identifier distribution method specifically includes：
Step S201：Base station is user terminal definition control component carrier and data component carrier；
Step S202：Base station defines a monitoring control component carrier and multiple auxiliary for the control component carrier of user terminal Control component carrier；
Step S203：Base station controls composition Carrier section to set Physical Cell Identifier indicating bit in monitoring, and passes through PDCCH Or PCFICH carryings；
Step S204：Base station sets user terminal the first comparison threshold value of link performance parameters；
Step S205：Base station sets the comparison threshold values of CM/PAPR second；
Step S206：Base station sets public Physical Cell Identifier and circulation time to move for all component carriers of user terminal Position or phaseshift step size produce whole Physical Cell Identifier；
Step S207：Base station obtains user terminal and carries out carrier aggregation operation using component carrier, starts Sounding flows Measure link performance parameters value；
Step S208：Base station receives link performance parameter value and with link performance threshold comparison, when control component carrier chain When road performance parameter is more than the first comparison threshold value, step S212 is performed；
Step S209：Base station obtains the CM/PAPR values of client feeds back；
Step S210：Base station judges whether CM/PAPR values are more than the second comparison threshold value, in this way, performs step S212, if It is no, perform step S211；
Step S211：User terminal carries out carrier aggregation operation using Physical Cell Identifier and with the component carrier of distribution；
Step S212：Whether the link performance parameters value of data component carrier is judged more than the first comparison threshold value, if so, holding Row step S214, if it is not, performing step S213；
Step S213：Base station changes circulation time displacement or phaseshift step size regenerates Physical Cell Identifier, and will be new Mark and component carrier notice user terminal；
Step S214：Base station is that data component carrier sets the public Physical Cell Identifier different from control component carrier；
Step S215：Base station sets Physical Cell Identifier indicating bit, and notifies user terminal by PDCCH or PCFICH；
Step S216：User terminal receive PDCCH or PCFIC on Physical Cell Identifier indicating bit, start cell searching with Flow is selected, obtains new Physical Cell Identifier；
Step S217：Judge whether the link performance parameters of data component carrier are more than the first comparison threshold value, if it is not, returning Step S212 is performed, if so, performing step S218；
Step S218：User terminal receives new Physical Cell Identifier and data component carrier notice, and log-on data forms Carrier wave sounding flows measure and feed back to base station；
Step S219：Judge whether the link performance parameters of sounding measurements are more than the first comparison threshold value, if performing Step S220, step S212 is performed if it is not, returning；
Step S220：Base station is that all data component carriers set different Physical Cell Identifier, and by new mark and Component carrier notifies user terminal.
By the above-mentioned technical proposal of the present embodiment, base station is that user terminal definition control component carrier and data composition carry Ripple, and control component carrier is further divided into monitoring control component carrier and auxiliary control component carrier, prison wherein Whole control signals is carried on control control component carrier, and Physical Cell Identifier indicating bit is only set in other parts, is subtracted Lack the size of control area required during control signaling carrying, and then reduce overhead.All control component carriers Using the public Physical Cell Identifier of identical, whole control signalings is carried, if control component carrier is comprising multiple single Component carrier, in order to effectively reduce CM and PAPR values, then, control composition intercarrier is shifted using circulation time or the side of phase shift Formula distributes Physical Cell Identifier, but not limited to this.Control the public Physical Cell Identifier of component carrier and data component carrier can With identical, the missing of the signal in orthogonal performance between reduction component carrier during distribution Physical Cell Identifier；It can also use different Public Physical Cell Identifier, while reach the coverage maximization of control signaling and significantly improving for user terminal link performance.
Fig. 3 is the primary structure schematic diagram of the base station of the embodiment of the present invention.
Shown in Figure 3, base station includes：
Division module 301, carried for the component carrier of all polymerizations to be divided into for the first composition of bearer control signalling Ripple and the second component carrier for carrying data transmission；
Distribute module 303, for distributing public Physical Cell Identifier for the first component carrier and the second component carrier；
Acquisition module 305, the link performance parameters value of user terminal is obtained for base station；And
Module 307 is redistributed, is first for base station when it is determined that link performance parameters value exceeds the first predetermined threshold value Component carrier and/or the second component carrier redistribute Physical Cell Identifier.
Alternatively, distribute module 303 includes：
Generation module (not shown), is shifted for base station by circulation time or phaseshift step size produces all public thing Cell ID is managed, and caused public Physical Cell Identifier is distributed into the first component carrier and the second component carrier.
Alternatively, redistributing module 307 includes：
Submodule (not shown) is redistributed, for the base station it is determined that the link performance of first component carrier Parameter value is more than the second default threshold without departing from first predetermined threshold value, the cubic measure of down link signal and peak-to-average power ratio When value and the link performance parameters of second component carrier are also greater than first predetermined threshold value, carried for the described second composition The Physical Cell Identifier different from first component carrier is matched somebody with somebody in wavelength-division.
Alternatively, redistributing module 307 also includes：
Change module (not shown), for base station it is determined that the link performance parameters value of the second component carrier without departing from the During one predetermined threshold value, base station is by changing circulation time displacement or phaseshift step size as the component carrier of all polymerizations or the first composition Carrier wave or the second component carrier produce new Physical Cell Identifier.
Fig. 4 is the broad flow diagram of the Physical Cell Identifier acquisition methods of the embodiment of the present invention.
Shown in Figure 4, Physical Cell Identifier acquisition methods include：
S401：User terminal is obtained and is distributed to the first component carrier and use for bearer control signalling first using base station In the public Physical Cell Identifier for the second component carrier that carrying data are sent；
S403：User terminal starts link performance parameters measurement, and parameter value is fed back into base station；And
S405：User terminal obtains base station and carried when it is determined that link performance parameters value exceeds the first predetermined threshold value for the first composition Ripple and/or the second component carrier redistribute new Physical Cell Identifier.
By the above-mentioned technical proposal of the present embodiment, user terminal by obtain base station distribute the public physical area of identical Mark, significantly reduces the interference of intercarrier, and when link performance parameters exceed predetermined threshold value, user receives base station distribution again Physical Cell Identifier, reduce component carrier between distribute Physical Cell Identifier when signal in orthogonal performance missing.
Preferably, Physical Cell Identifier acquisition methods also include：User terminal measures the equal work(of cubic measure and peak of user terminal Rate ratio, and by measurement feedback to base station；User terminal obtains base station it is determined that cubic measure and peak-to-average power ratio exceed second The new Physical Cell Identifier redistributed during predetermined threshold value for the second component carrier.
By the above-mentioned technical proposal of the present embodiment, user terminal obtains cubic measure and peak-to-average power ratio, and with default threshold Value compares, and just measure exceed predetermined threshold value with peak-to-average power ratio when, the Physical Cell Identifier redistributed of acquisition base station, The missing of signal in orthogonal performance when Physical Cell Identifier is distributed between component carrier so as to reduce.
Preferably, the new Physical Cell Identifier that user terminal obtains base station again for user terminal distribution includes：User terminates Receive the indicating bit that base station sends new Physical Cell Identifier；User terminal starts cell searching with selection flow according to indicating bit Obtain new Physical Cell Identifier.
Fig. 5 is the primary structure schematic diagram of the user equipment of the embodiment of the present invention.
Shown in Figure 5, user equipment includes：
First acquisition module 501, obtain for user terminal and distributed to first for bearer control signalling using base station The public Physical Cell Identifier of first component carrier and the second component carrier for carrying data transmission；
Measurement module 503, start link performance parameters measurement for user terminal, and the parameter value measured is fed back into base Stand；And
First redistributes module 505, and base station is obtained it is determined that link performance parameters value is pre- beyond first for user terminal If redistribute new Physical Cell Identifier during threshold value for the first component carrier and/or the second component carrier.
Alternatively, user equipment also includes：
Feedback module (not shown), for the cubic measure and peak-to-average power ratio of user terminal measurement user terminal, and it will survey Amount result feeds back to base station；
Second redistributes module (not shown), and base station is obtained it is determined that the equal power of cubic measure and peak for user terminal The new Physical Cell Identifier redistributed during than beyond the second predetermined threshold value for the second component carrier.
By the above embodiment of the present invention as can be seen that the present invention solve carrier aggregation in Physical Cell Identifier distribution ask Topic；Combined use by using identical public Physical Cell Identifier from different Physical Cell Identifier, solve public in carrier aggregation Channel performance present in adjacent cell interference problem present in common Physical Cell Identifier and different Physical Cell Identifier reduces The problem of.
It the above is only embodiments of the present invention, it is noted that for those skilled in the art, Without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as this hair Bright protection domain.

Claims (14)

  1. A kind of 1. Physical Cell Identifier distribution method, in carrier aggregation system, it is characterised in that including：
    The component carrier of all polymerizations is divided into for the first component carrier of bearer control signalling and for carrying data by base station The second component carrier sent；
    The base station is that first component carrier and second component carrier distribute public Physical Cell Identifier；
    The base station obtains the link performance parameters value of user terminal；And
    The base station when it is determined that the link performance parameters value exceeds the first predetermined threshold value, be first component carrier and/ Or second component carrier redistributes Physical Cell Identifier；
    The base station when it is determined that the link performance parameters value exceeds the first predetermined threshold value, be first component carrier and/ Or second component carrier is redistributed Physical Cell Identifier and included：
    The base station it is determined that the link performance parameters value of first component carrier without departing from first predetermined threshold value, descending The cubic measure and peak-to-average power ratio of link signal are beyond the second predetermined threshold value and the link performance of second component carrier When parameter value exceeds first predetermined threshold value, the thing different from first component carrier is distributed for second component carrier Manage cell ID.
  2. 2. Physical Cell Identifier distribution method as claimed in claim 1, it is characterised in that the base station is the described first composition Carrier wave and second component carrier, which distribute public Physical Cell Identifier, to be included：
    The base station is shifted by circulation time or phaseshift step size produces all public Physical Cell Identifier, and by caused institute State public Physical Cell Identifier and distribute to first component carrier and second component carrier.
  3. 3. Physical Cell Identifier distribution method as claimed in claim 2, it is characterised in that the base station is it is determined that the link When performance parameter value exceeds the first predetermined threshold value, redistributed for first component carrier and/or second component carrier Physical Cell Identifier includes：
    The base station is it is determined that the link performance parameters value of first component carrier exceeds first predetermined threshold value and institute When stating the link performance parameters value of the second component carrier without departing from first predetermined threshold value, the base station described in change by following Ring time shift or phaseshift step size are the component carrier of all polymerizations or first component carrier or second composition Carrier wave produces new Physical Cell Identifier.
  4. 4. Physical Cell Identifier distribution method as claimed in claim 2, it is characterised in that the base station is it is determined that the link When performance parameter value exceeds the first predetermined threshold value, redistributed for first component carrier and/or second component carrier Physical Cell Identifier includes：
    The base station is it is determined that the link performance parameters value of first component carrier exceeds first predetermined threshold value and institute When stating the link performance parameters value of the second component carrier and exceeding first predetermined threshold value, for second component carrier distribution with The different Physical Cell Identifier of first component carrier.
  5. 5. such as the Physical Cell Identifier distribution method any one of claim 1,3,4, it is characterised in that the base station exists It is first component carrier and/or second composition when determining that the link performance parameters value exceeds the first predetermined threshold value Carrier wave, which redistributes Physical Cell Identifier, also to be included：
    The base station is the every of first component carrier when redistributing Physical Cell Identifier for first component carrier One component carrier distributes identical Physical Cell Identifier；And
    The base station is the every of second component carrier when redistributing Physical Cell Identifier for second component carrier One component carrier distributes different Physical Cell Identifier.
  6. 6. Physical Cell Identifier distribution method as claimed in claim 1, it is characterised in that also include：
    The monitoring that first component carrier is divided into carrying full control signal by the base station controls component carrier and carrying The auxiliary control component carrier of component carrier related signaling, wherein, the monitoring control component carrier includes the described first composition A component carrier in carrier wave.
  7. A kind of 7. base station, it is characterised in that including：
    Division module, for by the component carrier of all polymerizations be divided into for bearer control signalling the first component carrier and be used for Carry the second component carrier that data are sent；
    Distribute module, for distributing public Physical Cell Identifier for first component carrier and second component carrier；
    Acquisition module, the link performance parameters value of user terminal is obtained for the base station；And
    Module is redistributed, for the base station when it is determined that the link performance parameters value exceeds the first predetermined threshold value, for institute State the first component carrier and/or second component carrier redistributes Physical Cell Identifier；
    The module of redistributing includes：
    Redistribute submodule, for the base station it is determined that the link performance parameters value of first component carrier without departing from institute State the first predetermined threshold value, the cubic measure of down link signal and peak-to-average power ratio and be more than the second predetermined threshold value and described second When the link performance parameters value of component carrier is also greater than first predetermined threshold value, for second component carrier distribution with it is described The different Physical Cell Identifier of first component carrier.
  8. 8. base station as claimed in claim 7, it is characterised in that the distribute module includes：
    Generation module, is shifted for the base station by circulation time or phaseshift step size produces all public physical area and marked Know, and the caused public Physical Cell Identifier is distributed into first component carrier and second component carrier.
  9. 9. base station as claimed in claim 8, it is characterised in that the module of redistributing also includes：
    Change module, for the base station it is determined that the link performance parameters value of second component carrier without departing from described first During predetermined threshold value, the base station is by changing the component carrier of the circulation time displacement or phaseshift step size for all polymerizations Or first component carrier or second component carrier produce new Physical Cell Identifier.
  10. A kind of 10. Physical Cell Identifier acquisition methods, in carrier aggregation system, it is characterised in that including：
    User terminal is obtained and distributed to first using base station for the first component carrier of bearer control signalling and for carrying number According to the public Physical Cell Identifier of the second component carrier of transmission；
    The user terminal starts link performance parameters measurement, and link performance parameters value is fed back into the base station；And
    It is described the when it is determined that the link performance parameters value exceed the first predetermined threshold value that the user terminal, which obtains the base station, One component carrier and/or second component carrier redistribute new Physical Cell Identifier；
    The base station when it is determined that the link performance parameters value exceeds the first predetermined threshold value for first component carrier and/or Second component carrier, which redistributes Physical Cell Identifier, to be included：
    The base station it is determined that the link performance parameters value of first component carrier without departing from first predetermined threshold value, descending The cubic measure and peak-to-average power ratio of link signal are beyond the second predetermined threshold value and the link performance of second component carrier When parameter value exceeds first predetermined threshold value, the thing different from first component carrier is distributed for second component carrier Manage cell ID.
  11. 11. Physical Cell Identifier acquisition methods as claimed in claim 10, it is characterised in that also include：
    The user terminal measures the cubic measure and peak-to-average power ratio of the down link signal, and by measurement feedback to institute State base station；
    The user terminal obtains the base station it is determined that the cubic measure and peak-to-average power ratio are when exceeding the second predetermined threshold value The new Physical Cell Identifier that second component carrier is redistributed.
  12. 12. the Physical Cell Identifier acquisition methods as described in claim 10 or 11, it is characterised in that the user terminal obtains institute It is first component carrier and/or described that base station, which is stated, when it is determined that the link performance parameters value exceeds the first predetermined threshold value Two component carriers, which redistribute new Physical Cell Identifier, to be included：
    The user terminal receives the indicating bit that the base station sends the new Physical Cell Identifier；
    The user terminal starts cell searching and obtains the new Physical Cell Identifier according to the indicating bit with selection flow.
  13. A kind of 13. user equipment, it is characterised in that including：
    First acquisition module, obtained for user terminal and distribute to the first composition for bearer control signalling first using base station The public Physical Cell Identifier of carrier wave and the second component carrier for carrying data transmission；
    Measurement module, start link performance parameters measurement for the user terminal, and the link performance parameters value measured is anti- Feed the base station；And
    First redistributes module, for the user terminal obtain the base station it is determined that the link performance parameters value beyond the During one predetermined threshold value new Physical Cell Identifier is redistributed for first component carrier and/or second component carrier；
    Described first redistribute module be used for the base station it is determined that the link performance parameters value of first component carrier not It is more than the second predetermined threshold value and institute beyond first predetermined threshold value, the cubic measure of down link signal and peak-to-average power ratio When stating the link performance parameters value of the second component carrier also greater than first predetermined threshold value, distributed for second component carrier The Physical Cell Identifier different from first component carrier.
  14. 14. user equipment as claimed in claim 13, it is characterised in that also include：
    Feedback module, measures the cubic measure and peak-to-average power ratio of the user terminal for the user terminal, and by measurement result Feed back to the base station；
    Second redistributes module, and the base station is obtained it is determined that the cubic measure and peak-to-average power ratio for the user terminal The new Physical Cell Identifier redistributed during beyond the second predetermined threshold value for second component carrier.
CN201110343600.4A 2011-11-03 2011-11-03 Physical Cell Identifier distributes and acquisition methods, base station and user equipment Active CN102438247B (en)

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