CN106454961A - Cell switching method, system and device for flexible bandwidth - Google Patents

Cell switching method, system and device for flexible bandwidth Download PDF

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Publication number
CN106454961A
CN106454961A CN201510483507.1A CN201510483507A CN106454961A CN 106454961 A CN106454961 A CN 106454961A CN 201510483507 A CN201510483507 A CN 201510483507A CN 106454961 A CN106454961 A CN 106454961A
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information
carrier wave
target
measurement
terminal
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CN106454961B (en
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许森
孙震强
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a cell switching method, system and device for flexible bandwidth, and relates to the field of wireless communication. The cell switching scheme can enable a terminal to switch directly from the extended carrier of a serving cell to the extended carrier of a target cell without firstly switching to the master carrier at a target side and then switching from the master carrier to the extended carrier, thereby reducing the switching delay.

Description

For the cell switching method of flexible bandwidth, system and equipment
Technical field
The present invention relates to wireless communication field, cut particularly to a kind of cell for flexible bandwidth Change method, system and equipment.
Background technology
In current Long Term Evolution (Long Term Evolution, LTE)/LTE-A agreement, LTE single carrier bandwidth for example supports 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, Several configuration such as 20MHz.However, the second filial generation (the 2G)/third generation (3G) communication system As global system for mobile communications (GSM)/WCDMA (WCDMA)/CDMA2000 It is not the integral multiple of LTE carrier bandwidths etc. the carrier bandwidths sum of multiple frequencies.This feelings Condition can cause LTE efficiently cannot utilize 2G/3G frequency resource, leads to the wave of frequency resource Take.For this reason, industry proposes " flexible bandwidth ", to more flexible and efficient using existing Frequency resource, promotes the work of backsetting of 2G/3G frequency.
The principle of " flexible bandwidth " technology is as shown in figure 1, be directed to a for example descending 7MHz Bandwidth, base station side all carries out the transmitting of signal in whole 7MHz, for not supporting " spirit For the conventional terminal UE1 of bandwidth alive ", it can only be in the band being operated in traditional 5MHz On width, remaining 2MHz bandwidth resources are unusable for conventional terminal UE1.For For supporting the terminal UE 2 of " flexible bandwidth ", both can be operated in traditional 5MHz band It is also possible to be operated in extension 5MHz bandwidth on width.So new terminal and conventional terminal can To work in different 5MHz bandwidth, thus solving the compatibility issue of carrier wave, realize Frequency is backsetted.
In the present invention, do not support that the carrier wave that the terminal of flexible bandwidth can access is referred to as main carrier, Do not support that the carrier wave that the terminal of flexible bandwidth cannot access referred to as extends carrier wave.Can on main carrier With the regulation according to 3GPP R12 and version before, launch descending common control signal, PBCH, synchronizing signal etc..On the non-overlapping region with main carrier for the extension carrier wave, do not send Descending common control signal, Physical Broadcast Channel (Physical Broadcast Channel, PBCH), synchronizing signal etc., but still send public reference signal (Common Reference Signal, CRS) signal.Terminal works are when extending carrier wave, descending by reading enhancing Physical control channel (enhanced Physical Downlink Control Channel, EPDCCH) obtaining schedule information and the feedback information of base station side.Fig. 2 shows " flexibly The frequency partition schematic diagram of bandwidth ".
After " flexible bandwidth " technology of introducing, the minizone for current LTE/LTE-A is cut Change and there is certain impact.
For example, terminal cannot realize neighboring interval extension carrier wave to the switching of extension carrier wave, due to spirit Bandwidth of living also does not introduce standard, and the therefore related news of current handover procedures also cannot be supported to expand The information transmission of exhibition carrier wave, therefore terminal is only switched into the main carrier of target side, then again from Extension carrier wave is switched on main carrier.The signaling burden eated dishes without rice or wine, switching time so can be increased Also long, affect Consumer's Experience.
Content of the invention
A technical problem to be solved by this invention is：In flexible bandwidth technology, neighboring interval extension carries Ripple is to the switching problem of extension carrier wave.
According to the first aspect of the invention, there is provided a kind of cell switching method for flexible bandwidth, Including：Serving BS sends neighbor measurement information to terminal, and described neighbor measurement information includes mesh The measurement carrier information of mark cell and the cell information supporting extension carrier wave, so that terminal is according to institute State neighbor measurement information and determine the carrier type that Target cell is needed with measurement, and measure； Serving BS obtains the measurement result of the Target cell of terminal to report, in the survey of described Target cell Amount result includes the identification information of carrier type corresponding to each measurement result, carrier wave therein Type includes main carrier and extension carrier wave；Serving BS judges whether terminal meets switching condition, If terminal meets switching condition, the target BS belonging to Target cell sends handover request, institute State the measurement result carrying described Target cell in handover request and terminal capability, so that target base Stand in response to described handover request, according to measurement result, the described target base of described Target cell The bandwidth ability stood and terminal capability determine that terminal needs the carrier type accessing, and return and cut Change and respond to serving BS, in described handoff response, carried terminal needs the carrier-class of access carrier The identification information of type, and if identification information represents that terminal needs access extension carrier wave, then institute State the flexible bandwidth configuration information also carrying described target BS in handoff response；Serving BS rings The described handoff response that should return in target BS, sends switching command to terminal, to indicate end End switches over, and described switching command carried terminal needs the identification of the carrier type of access carrier Information, and if identification information represents that terminal needs access extension carrier wave, then described switching life The flexible bandwidth configuration information of described target BS is also carried, so that terminal is cut according to described in order Change order to be switched on the corresponding carrier wave of Target cell.
According to the second aspect of the invention, there is provided a kind of cell switching method for flexible bandwidth, Including：Terminal measurement result to Target cell to serving base stations report, in described Target cell Measurement result include the identification information of the corresponding carrier type of each measurement result, load therein Ripple type includes main carrier and extension carrier wave, so that serving BS is by the measurement of described Target cell The target BS that result is sent to belonging to Target cell switches over decision-making；Terminal response is in service The switching command that base station sends, is linked into the corresponding carrier wave of Target cell according to described switching command On, described switching command carried terminal needs the identification information of the carrier type of access carrier, and And if identification information represents that terminal needs access extension carrier wave, then also take in described switching command Flexible bandwidth configuration information with described target BS.
According to the third aspect of the invention we, there is provided a kind of cell switching method for flexible bandwidth, Including：Target BS receives the handover request that serving BS sends, and carries in described handover request The measurement result of terminal-pair Target cell and terminal capability, in the measurement result of described Target cell Include the identification information of the corresponding carrier type of each measurement result, carrier type therein includes Main carrier and extension carrier wave；Target BS is according to the measurement result of described Target cell, described mesh The mark bandwidth ability of base station and terminal capability determine that terminal needs the carrier wave accessing, and return and cut Change and respond to serving BS, in described handoff response, carried terminal needs the carrier-class of access carrier The identification information of type, and if identification information represents that terminal needs access extension carrier wave, then institute State the flexible bandwidth configuration information also carrying described target BS in handoff response, so that service base Instruction terminal of standing accesses on corresponding carrier wave.
According to the fourth aspect of the invention, there is provided a kind of base station, described base station is that terminal is current Serving BS, described base station includes：Neighbor measurement information transmitting element, surveys for sending adjacent area To terminal, described neighbor measurement information includes the measurement carrier information of Target cell and props up amount information Hold the cell information of extension carrier wave, so that terminal determines to target according to described neighbor measurement information Cell needs the carrier type of measurement, and measures；Measurement result acquiring unit, is used for obtaining Take the measurement result of the Target cell of terminal to report, wrap in the measurement result of described Target cell Include the identification information of carrier type corresponding to each measurement result, carrier type therein includes leading Carrier wave and extension carrier wave；Switching treatmenting unit, for judging whether terminal meets switching condition, If terminal meets switching condition, the target BS belonging to Target cell sends handover request, institute State the measurement result carrying described Target cell in handover request and terminal capability, so that target base Stand in response to described handover request, according to measurement result, the described target base of described Target cell The bandwidth ability stood and terminal capability determine that terminal needs the carrier wave accessing, and return switching sound Should, in described handoff response, carried terminal needs the identification information of the carrier type of access carrier, And if identification information represents that terminal needs access extension carrier wave, then in described handoff response also Carry the flexible bandwidth configuration information of described target BS；Switching command unit, in response to The described handoff response that target BS returns, is sent switching command to terminal, is entered with instruction terminal Row switching, described switching command carried terminal needs the identification information of the carrier type of access carrier, And if identification information represents that terminal needs access extension carrier wave, then in described switching command also Carry the flexible bandwidth configuration information of described target BS, so that terminal is according to described switching command It is switched on the corresponding carrier wave of Target cell.
According to the fifth aspect of the invention, there is provided a kind of terminal, including：Declaration form in measurement result Unit, for the measurement result to Target cell to serving base stations report, in described Target cell Measurement result includes the identification information of the corresponding carrier type of each measurement result, carrier wave therein Type includes main carrier and extension carrier wave, so that the measurement of described Target cell is tied by serving BS The target BS that fruit is sent to belonging to Target cell switches over decision-making；Switch unit, for ringing The switching command that should send in serving BS, is linked into Target cell phase according to described switching command On the carrier wave answered, described switching command carried terminal needs the identification of the carrier type of access carrier Information, and if identification information represents that terminal needs access extension carrier wave, then described switching life Also carrying the flexible bandwidth configuration information of described target BS in order, to be linked into Target cell corresponding On carrier wave.
According to the sixth aspect of the invention, there is provided a kind of base station, described base station is that terminal is intended to switch Target BS belonging to Target cell, described base station includes：Handover request acquiring unit, is used for Receive the handover request that serving BS sends, in described handover request, carried terminal is to Target cell Measurement result and terminal capability, the measurement result of described Target cell include each measurement The identification information of the corresponding carrier type of result, carrier type therein includes main carrier and extension carries Ripple；Switching treatmenting unit, for according to the measurement result of described Target cell, described target base The bandwidth ability stood and terminal capability determine that terminal needs the carrier wave accessing, and return switching sound Serving BS should be given, in described handoff response, carried terminal needs the carrier type of access carrier Identification information, and if identification information represents that terminal needs access extension carrier wave, then described cut Change the flexible bandwidth configuration information also carrying described target BS in response, so that serving BS refers to Show that terminal accesses on corresponding carrier wave.
According to the seventh aspect of the invention, there is provided a kind of cell handover system for flexible bandwidth, Including described in the terminal described in the serving BS described in fourth aspect, the 5th aspect and the 6th aspect Target BS.
The present invention at least has advantages below：
The cell handover scheme of the present invention can make terminal directly switch from the extension carrier wave of Serving cell To the extension carrier wave of Target cell, need not first be switched to the main carrier of target side, then cut from main carrier Change to extension carrier wave, handover delay can be reduced.
By the detailed description to the exemplary embodiment of the present invention referring to the drawings, the present invention Further feature and its advantage will be made apparent from.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will The accompanying drawing of required use in embodiment or description of the prior art is briefly described it is clear that Ground, drawings in the following description are only some embodiments of the present invention, the common skill for this area For art personnel, without having to pay creative labor, can also be obtained according to these accompanying drawings Obtain other accompanying drawings.
Fig. 1 illustrates the principle schematic of flexible bandwidth technology.
Fig. 2 illustrates the frequency partition schematic diagram of flexible bandwidth.
Fig. 3 illustrates the synchronizing signal schematic diagram of flexible bandwidth.
Fig. 4 illustrates that the present invention is used for the flow process of one embodiment of cell synchronous method of flexible bandwidth and shows It is intended to.
Fig. 5 illustrates that the present invention is used for the flow process of one embodiment of cell measuring method of flexible bandwidth and shows It is intended to.
Fig. 6 illustrates that the present invention is used for the flow process of one embodiment of cell switching method of flexible bandwidth and shows It is intended to.
Fig. 7 is the structural representation of the cell handover system that the present invention is used for flexible bandwidth.
Fig. 8 A is the structural representation of 72 1 embodiments of serving BS of the present invention.
Fig. 8 B is the structural representation of another embodiment of serving BS 72 of the present invention.
Fig. 9 A is the structural representation of 74 1 embodiments of terminal of the present invention.
Fig. 9 B is the structural representation of another embodiment of terminal 74 of the present invention.
Figure 10 is the structural representation of target BS 76 of the present invention.
Figure 11 is the structural representation of the cell measurement system that the present invention is used for flexible bandwidth.
Figure 12 is the structural representation of serving BS 112 of the present invention.
Figure 13 A is the structural representation of 114 1 embodiments of terminal of the present invention.
Figure 13 B is the structural representation of another embodiment of terminal 114 of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical scheme in the embodiment of the present invention It is clearly and completely described it is clear that described embodiment is only present invention part reality Apply example, rather than whole embodiments.Description at least one exemplary embodiment is actual below On be merely illustrative, never as any restriction to the present invention and its application or use.Base Embodiment in the present invention, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, broadly falls into the scope of protection of the invention.
Requirements of one's work are backsetted it is proposed that flexible bandwidth technology based on frequency.Flexible bandwidth technology pair Current communication process can produce some impacts, the stationary problem of such as neighboring interval, neighboring interval Carrier wave measurement problem, switching problem of neighboring interval etc..Will be described below introducing flexible bandwidth skill Postoperative, the solution of these problems.
After introducing flexible bandwidth technology, according to traditional synchronization mechanism, terminal cannot capture adjacent area Synchronizing signal.Taking LTE system as a example, synchronizing signal is usually located at the centre 6 of each carrier wave On Physical Resource Block (PRB).The synchronizing signal schematic diagram in flexible bandwidth with reference to shown in Fig. 3, Synchronizing signal is not completely included on centre 6 PRB of extension carrier wave.
In order to solve the stationary problem in above-mentioned flexible bandwidth, the present invention proposes a kind of being used for flexibly The cell synchronous scheme of bandwidth.Referring to Fig. 4, the cell synchronous scheme for flexible bandwidth is as follows：
In step S402, serving BS obtains the flexible bandwidth configuration information of target BS, and will The flexible bandwidth configuration information of the target BS getting is sent to terminal.Accordingly, terminal connects Receive the flexible bandwidth configuration information of the target BS that serving BS sends.
The bandwidth that flexible bandwidth configuration information therein for example can include main carrier (uses B1 table Show), the extension bandwidth (being represented with B2) of carrier wave, the total bandwidth of flexible bandwidth (use B0 Represent) etc. information.Obviously, flexible bandwidth configuration information can also represent in other ways, energy Enough reflect whether that the representation being configured with the information such as the bandwidth of extension carrier wave and each carrier wave is equal Can adopt.
Some exemplary methods, serving BS can be connect by X2 interface message or S1 Mouth message or the flexible bandwidth configuration information of network management configuration message acquisition target BS.
In step S404, terminal is according to the flexible bandwidth of present operating frequency and target BS Configuration information determines the test position of synchronizing signal.
For example, taking LTE system as a example, if terminal is currently operating on main carrier, can Synchronizing signal is detected with the center of the main carrier from target BS；If terminal work at present On extension carrier wave, then can be corresponding with main carrier center from the extension carrier wave of target BS Synchronizing signal is detected in position.If according to traditional synchronous method, in the centre bit of extension carrier wave The place's of putting detection then possibly cannot obtain or cannot all obtain synchronizing signal.
Additionally, according to above-mentioned synchronous method, terminal can detect the main synchronization of LTE system Signal (PSS), then referring again to auxiliary synchronous signals (SSS), Physical Broadcast Channel (PBCH) Relative position relation with PSS, you can SSS, PBCH is detected further, to complete Cell synchronisation procedure.
After introducing flexible bandwidth technology, terminal cannot determine whether adjacent area is measured.For Measurement problem in flexible bandwidth, the present invention proposes a kind of cell measurement scheme for flexible bandwidth. Cell synchronous were completed before cell measurement, cell synchronisation procedure can be using corresponding to Fig. 4 The scheme of embodiment, it would however also be possible to employ other cell synchronous schemes.Referring to Fig. 5, carry for flexible Wide cell measuring method is as follows：
In step S502, serving BS obtains the flexible bandwidth configuration information of target BS.If entering Row cell synchronisation procedure has got the flexible bandwidth configuration information of target BS, then carry out little The flexible bandwidth configuration information obtaining target BS need not be repeated during region measurement.
In step S504, serving BS determines mesh according to the flexible bandwidth configuration information of target BS The measurement carrier information of mark cell and the cell information supporting extension carrier wave.
If wherein target BS is configured with extension carrier wave, the measurement carrier information of Target cell can It is configured to measure the main carrier of Target cell and extension carrier wave, if target BS is configured without extending Carrier wave, then Target cell measurement carrier information can be configured to measurement Target cell main carrier. It is obvious also possible to determine the measurement carrier information of Target cell using additive method, for example, if Target BS is configured with extension carrier wave, and the measurement carrier information of Target cell can be configured to measurement mesh The extension carrier wave of mark cell.
Wherein, if target BS is configured with extension carrier wave, all cells of target BS are all joined It is set to the cell supporting extension carrier wave, if conversely, target BS is configured without extending carrier wave, All cells of target BS are not all configured to support the cell of extension carrier wave.
In step S506, serving BS sends neighbor measurement information to terminal, accordingly, terminal Receive the neighbor measurement information that serving BS sends.Additionally, serving BS can be by target BS Flexible bandwidth configuration information and neighbor measurement information send jointly to terminal.
Neighbor measurement information includes the measurement carrier information of Target cell and supports extension carrier wave Cell information, in addition, it can include the information such as measurement event and measurement of correlation parameter, phase Close measurement parameter and for example include measurement amount, measurement gap, thresholding etc., but be not limited to examples cited.
Wherein, the measurement carrier information of Target cell can be represented with 2 bit informations, for example, 10 expressions only measure main carrier, and 01 represents only measurement extension carrier wave, 11 expressions measurement master simultaneously Carrier wave and extension carrier wave, 00 reserves.
Wherein, the cell information supporting extension carrier wave for example can be realized in the way of using list, Support the Cell ID List of extension carrier wave, only when measurement carrier information is set to 01 or 11 Effectively.
In step S508, terminal determines according to neighbor measurement information needs measurement to Target cell Carrier type.The exemplary determination method of one of which is as follows：
If the measurement carrier information of Target cell represents measurement main carrier it is determined that little to target The main carrier in area measures；Or if the measurement carrier information of Target cell represents that measurement is expanded Exhibition carrier wave, and support there is no Target cell it is determined that not right in the cell information extend carrier wave Target cell measures；Or if the measurement carrier information of Target cell represents measurement extension Carrier wave, and support there is Target cell it is determined that little to target in the cell information extend carrier wave The extension carrier wave in area measures；Or if the measurement carrier information of Target cell represents measurement Main carrier and extension carrier wave, and support there is Target cell, then in the cell information extend carrier wave Determine that the main carrier to Target cell and extension carrier wave measure；Or if Target cell Measurement carrier information represents measurement main carrier and extension carrier wave, and supports to extend the cell of carrier wave There is no Target cell it is determined that measuring to the main carrier of Target cell in information.
In step S510, terminal determines carrier wave based on the flexible bandwidth configuration information of target BS Measurement range, wherein, the measurement range of extension carrier wave is [F-B1/2+B0-B2, F-B1/2+B0], Wherein, F represents the center frequency point of main carrier, announces in broadcast, and B0 represents flexible load Ripple total bandwidth, B2 represents the bandwidth of extension carrier wave, and B1 represents the bandwidth of main carrier.Main carrier Measurement range be [F-B1/2, F+B1/2].
Obviously, the execution of step 508 and step S510 order in no particular order.
In step S512, terminal according to the Target cell determining need the carrier type of measurement with And carrier wave measurement range is measured accordingly, such as Reference Signal Received Power (RSRP) And/or the measurement such as Reference Signal Received Quality (RSRQ).
Above-mentioned cell measuring method, determines and sends to terminal the survey of Target cell by serving BS The neighbor measurement informations such as the cell information of amount carrier information and support extension carrier wave, terminal is according to adjacent area Metrical information is known that the extension carrier wave configuring condition of Target cell, and then determines that Target cell needs Carrier type to be measured, thus avoid blindly measuring the measuring error leading to.Additionally, service base Stand and can also send the flexible bandwidth configuration information of Target cell to terminal, help terminal correctly to arrange The hunting zone of target side synchronizing signal, and correctly configure Measurement bandwidth, improve the accuracy of measurement.
The present invention also proposes a kind of cell handover scheme, and terminal can be made to carry from the extension of Serving cell Ripple is directly switch to the extension carrier wave of Target cell, need not first be switched to the main carrier of target side, then It is switched to extension carrier wave from main carrier, handover delay can be reduced.Terminal before cell switching Complete cell measurement, cell measurement procedure can adopt the scheme of embodiment corresponding to Fig. 5, Other cell measurement schemes can also be adopted.
Referring to Fig. 6, the cell switching method for flexible bandwidth is as follows：
In step S602, serving BS obtains the measurement result of the Target cell of terminal to report, in mesh The measurement result of mark cell includes the identification information of carrier type corresponding to each measurement result, its In carrier type include main carrier and extension carrier wave.
In step S604, serving BS judges whether terminal meets switching condition, if terminal meets cutting Change condition, the target BS belonging to Target cell sends handover request, carries mesh in handover request The measurement result of mark cell and terminal capability.Terminal capability represents whether terminal supports flexible carrier wave.
Wherein, serving BS can be according to measurement result and carrier wave corresponding to each measurement result The handoff threshold of type judges whether to meet switching condition, and wherein, different carrier types configures There are different handoff thresholds.Thus realizing more flexibly switching.
In step S606, target BS in response to handover request, according to the measurement result of Target cell, The bandwidth ability of target BS and terminal capability determine that terminal needs the carrier type accessing.
A kind of exemplary determination terminal needs the method for the carrier type of access as follows：
If the bandwidth ability of target BS represents that target BS is configured without flexible bandwidth, or such as Only have the measurement result of main carrier in the measurement result of fruit Target cell, or terminal is not supported flexibly Bandwidth is it is determined that terminal needs to access main carrier；Or
If the bandwidth ability of target BS represents that target BS is configured with flexible bandwidth, and target Only extend the measurement result of carrier wave in the measurement result of cell, and terminal support flexible bandwidth, Then determine that terminal needs to access extension carrier wave；Or
If the bandwidth ability of target BS represents that target BS is configured with flexible bandwidth, and target The measurement result of cell includes main carrier and the measurement result of extension carrier wave, and terminal supports spirit Bandwidth alive, then select a carrier wave to be defined as end according to preset strategy from main carrier and extension carrier wave End needs the carrier wave accessing.
Preset strategy therein can be for example：Target BS according to the information on load of each carrier wave, At least one information in resource occupation information, signal quality information, carries from main carrier and extension A carrier wave is selected to be defined as the carrier wave that terminal needs to access in ripple.Or, target BS according to The precedence information of the dissimilar carrier wave being pre-configured with, selects from main carrier and extension carrier wave One carrier wave is defined as the carrier wave that terminal needs to access.
In step S608, target BS returns handoff response to serving BS, carries in handoff response Terminal needs the identification information of the carrier type of access carrier, and if identification information represents terminal Need to access extension carrier wave, then also carry the flexible bandwidth configuration information of target BS in handoff response.
The handoff response returning in response to target BS in step S610, serving BS, sends switching Order to terminal, switched over instruction terminal, switching command carried terminal needs access carrier The identification information of carrier type, and if identification information represents that terminal needs access extension carrier wave, Then also carry the flexible bandwidth configuration information of target BS in switching command, so that terminal is according to switching Order is switched on the corresponding carrier wave of Target cell.
Wherein, if switching command instruction terminal is switched to extension carrier wave, terminal can be according to target The flexible bandwidth configuration information of base station directly from serving BS extension carrier switch to Target cell Extension carrier wave.
In the present invention, a cell switch process can adopt the little of embodiment corresponding to Fig. 4 The cell measurement scheme of embodiment corresponding to area's synchronization scenario, Fig. 5 and the corresponding enforcement of Fig. 6 The cell handover scheme of example.Cell switch process detailed process is as follows：
In step 1, support that X2 message or S1 message or webmaster can be passed through in the base station of flexible bandwidth Configuration message notifies the flexible bandwidth configuration information of this base station to belonging to this base station neighbor cell Base station.Wherein flexible bandwidth configuration information includes but is not limited to：The bandwidth B 1 of main carrier, extension The bandwidth B 2 of carrier wave, total bandwidth B0 of flexible bandwidth.
In step 2, serving BS, according to the flexible bandwidth configuration information of adjacent area, determines this adjacent area Measurement carrier information, and determine the cell list supporting extension carrier wave, so that terminal is measuring this neighbour Measurement extension carrier wave is determined whether to during area.
In step 3, serving BS passes through height for the terminal preparing to be switched on adjacent area extension carrier wave Layer signaling sends flexible bandwidth configuration information and neighbor measurement information.
Wherein flexible bandwidth configuration information including but not limited to：The bandwidth B 2 of extension carrier wave, flexibly Total bandwidth B0 of bandwidth.
Wherein neighbor measurement information includes but is not limited to following content：
The measurement carrier information of Target cell：2 bit informations, are to represent when 10 only to measure main load Ripple, is to represent only measurement extension carrier wave when 01, and 11 represent measurement main carrier and extension carrier wave simultaneously, 00 reserves.
Support the cell list (PCI list) of extension carrier wave.Only enable extension carrier wave measurement, Measurement carrier information is set to effective when 01 and 11.
Measurement event and measurement of correlation parameter：For example include measurement amount and measurement gap (GAP) And the information such as thresholding, but it is not limited to examples cited.
In step 4, after terminal receives the configuration message of serving BS, terminal is based on target BS Flexible bandwidth configuration information determine carrier wave measurement range, wherein, extension carrier wave measurement range For [F-B1/2+B0-B2, F-B1/2+B0], wherein, F represents the center frequency point of main carrier, Announce in broadcast, B0 represents flexible carrier wave total bandwidth, B2 represents the bandwidth of extension carrier wave, B1 represents the bandwidth of main carrier.The measurement range of main carrier is [F-B1/2, F+B1/2].So Configuring in pairs in the measurement of RSRP and/or RSRQ according to base station side afterwards.
In step 5, terminal is according to the flexible bandwidth configuration letter of present operating frequency and target BS Breath determines the test position of synchronizing signal, and synchronizes, and obtains the PCI letter of Target cell Breath.
The measurement carrier information of the Target cell being issued according to base station in step 6, terminal and support The cell list of extension carrier wave determines the carrier type that Target cell is needed with measurement.
" the measurement carrier information of Target cell " if of base station side setting is " 10 ", only Scope for the main carrier of Target cell measures, if being set to " 01 " and this PCI letter Breath is not in the neighbor measurement information " supporting the cell list of extension carrier wave " that base station issues, then This adjacent cell is not measured.If being set to " 01 " and this PCI information issuing in base station The neighbor measurement information cell list of carrier wave " support extension " in, then Target cell is only surveyed Amount extension carrier wave.If being set to the neighbor measurement information that " 11 " and this PCI information issue in base station In the cell list of carrier wave " support extension ", then for Target cell measure simultaneously extension carrier wave and Main carrier.If provided as " 11 " and the neighbor measurement information that do not issue in base station of this PCI information In " supporting the cell list of extension carrier wave ", then main carrier is only measured for Target cell.
In step 7, if the measurement result of Target cell meets the measurement of the adjacent area of serving BS configuration The trigger condition of dependent event in information, then terminal is to serving base stations report measurement result.In terminal In the measurement result of the adjacent area reporting, setting 1 bit identification information is used for distinguishing each measurement result It is the main carrier for this Target cell or extension carrier wave.
In step 8, serving BS finds that the measurement result of terminal to report meets switching condition, is cutting The measurement result changing carried terminal in request message notifies to the target BS belonging to Target cell.Cut Change in request message can with carried terminal ability,
In step 9, the target BS belonging to Target cell is according to the measurement result of terminal, target base The bandwidth ability stood and terminal capability determine the carrier type that terminal accesses, and determine that method is as follows：
If target BS is configured without flexible bandwidth or terminal has only reported the measurement of main carrier to tie Really, then execute subsequent operation according to existing handover mechanism, and be only capable of being operated in after terminal switching On main carrier.If target BS is provided with flexible bandwidth, and terminal has only reported the survey of extension carrier wave Amount result, then judge that terminal is only capable of being operated on extension carrier wave, and execute follow-up receiving process. If terminal to report extension carrier wave and the measurement result of main carrier, according to the load condition of two carrier waves Or the height of signal quality or the precedence information pre-setting determine that terminal is resident after switching Carrier wave.
In step 10, the resident carrier information after target BS switches terminal passes through handoff response Message is indicated to serving BS.In handoff response, carried terminal needs the carrier type of access carrier Identification information, and if identification information represent terminal needs access extension carrier wave, then switch The flexible bandwidth configuration information of target BS is also carried to assist terminal to access, with housecoat in response Business base station instruction terminal accesses on corresponding carrier wave.
In step 11, after serving BS receives switching response message, send switching command to terminal, Switched over instruction terminal, switching command carried terminal needs the knowledge of the carrier type of access carrier Other information, and if identification information represents that terminal needs access extension carrier wave, then in switching command Also carry the flexible bandwidth configuration information of target BS, to assist terminal to switch.
In step 12, after terminal receives switching command, Target cell is linked into according to switching command On corresponding carrier wave, if switching command instruction terminal is switched to extension carrier wave, terminal can root According to target BS flexible bandwidth configuration information directly from the extension carrier switch of serving BS to mesh The extension carrier wave of mark cell.
Above-mentioned cell switch process, by supporting the configuration feelings flexible bandwidth for the base station of flexible bandwidth Condition is indicated to the adjacent area of surrounding by interface, according to this configuration information, surrounding adjacent area determines that terminal measures When carrier wave candidate collection.Serving BS (or claim source base station) flexible bandwidth configuration information and The carrier wave candidate collection of nearby region measurement is allocated to the terminal being operated on extension carrier wave, and terminal is according to neighbour The carrier wave candidate collection of region measurement determines whether to measure the signal extending on carrier wave of Target cell Quality and/or signal intensity, and by the main carrier in the adjacent area meeting condition and/or extension carrier wave Signal quality and/or reporting signal strength to serving BS, serving BS is if it find that adjacent area Signal intensity and/or signal quality meet switching condition, then terminal is carried in main carrier and/or extension Measurement result on ripple is indicated to target BS by handover request message, and target BS is according to current The measurement result of the loading condition of itself the and terminal carrier wave resident to determine terminal, and by cutting Changing response response message selects situation and relevant configuration information to notify carrier wave to serving BS.Clothes Business base station selects situation and relevant configuration information to notify carrier wave to terminal, and terminal refers to according to base station Show that information accesses on the correlated carrier wave of target BS.The program is smaller to the change of network side, There is good exploitativeness it is easy to promote.
The application example of some cell switching is set forth below.
Application example 1
In this example, terminal UE 1 supports flexible bandwidth.Serving BS supports the bandwidth of 25MHz Setting, target BS only supports that 20MHz bandwidth is arranged.Between serving BS and target BS when Front no X2 interface, needs to realize the interaction of information by setting up X2 interface.Serving BS bag Three sectors are contained, wherein terminal UE 1 is located at the edge of Cell 01.Target BS also contains Three sectors, UE1 will be switched to Cell 11.The wherein PCI of Cell 11 is PCI 20.
Step 1：Serving BS initiates to set up process, wherein serving BS with the X2 of target BS Set up in X2 and carry following information in request (X2SETUP REQUEST) message：
1) bandwidth of main carrier：20MHz
2) total bandwidth of flexible bandwidth：25MHz
3) extend the bandwidth of carrier wave：20MHz
Step 2：Target BS is due to currently without flexible configuration bandwidth, setting up in the X2 of feedback The configuration information of flexible bandwidth is not carried in response (X2SETUP RESPONSE) message.
Step 3：Serving BS determines target BS according to X2SETUP RESPONSE message What the PCI of three cells supported was not provided with neighbor measurement information " supports extension carrier wave In cell list ".
Step 4：Serving BS prepares to be switched to terminal UE 1 to extend to be operated on carrier wave, profit With wireless resource control connection reconfiguration (RRC Connection Reconfiguration) message For this terminal flexible configuration bandwidth information and neighbor measurement information.
Wherein flexible bandwidth information can comprise following information：
Bandwidth 20MHz of extension carrier wave；
Total bandwidth 25MHz of flexible bandwidth.
Wherein neighbor measurement information contains following information：
The measurement carrier information of Target cell：11；
Support no PCI20 in the cell list of extension carrier wave；
The measurement event of configuration and dependent threshold parameter：A3 measurement event.
Step 5：Terminal UE 1 receives recording-related information after this configuration message, measures as follow-up Benchmark, and feed back wireless resource control connection reconfiguration and complete (RRC Connection Reconfiguration Complete) message.
Step 6：Terminal UE 1, according to the configuration of present operating frequency and flexible bandwidth, determines The test position of PSS/SSS/PBCH.And on this position detect adjacent area PCI information, and Detect PCI20.Find that PCI20 does not extend the cell row of carrier wave in the support of neighbor measurement information In table, therefore terminal is determined and main carrier is only measured for this adjacent area.
Step 7：The signal intensity that terminal UE 1 measures Target cell meets trigger condition, therefore To serving base stations report measurement result.
Step 8：After serving BS receives, can cut in version according to 3GPP R12 and before Change of current journey is processed.If meeting switching condition, terminal can be switched to the main carrier of Target cell.
Application example 2
In this example, terminal UE 1 supports flexible bandwidth.Serving BS supports the bandwidth of 25MHz Setting, target BS supports the setting of 25MHz bandwidth.Current between serving BS and target BS There is X2 interface, target BS is configured without flexible bandwidth before certain time point, after triggering configuration It is indicated to its parameter of serving BS by X2 message to change.Serving BS contains three fans Area, wherein terminal UE 1 are located at the edge of Cell 01.Target BS also contains three sectors, UE1 will be switched to Cell 11.The wherein PCI of Cell 11 is PCI 20.
Step 1：Target BS initiates the X2 renewal process with serving BS, wherein target BS Carry following information in base station configuration updating (eNB Configuration Update) message：
1) bandwidth of main carrier：20MHz
2) total bandwidth of flexible bandwidth：25MHz
3) extend the bandwidth of carrier wave：20MHz
Step 2：Serving BS receives eNB Configuration Update message it is thus understood that mesh Flexible bandwidth configuration is supported in mark base station, and the PCI of three cells therefore supported target BS is " supporting the cell list of extension carrier wave " in neighbor measurement information is set.And feed back base station Config update confirms (eNB Configuration Update ACK) message.
Step 3：Serving BS prepares to be switched to terminal UE 1 to extend to be operated on carrier wave, profit It is this terminal flexible configuration bandwidth information with RRC Connection Reconfiguration message And neighbor measurement information.
Wherein flexible bandwidth information can comprise following information：
Bandwidth 20MHz of extension carrier wave；
Total bandwidth 25MHz of flexible bandwidth.
Wherein neighbor measurement information contains following information：
The measurement carrier information of Target cell：11.
There is PCI20 in the cell list supporting extension carrier wave
The measurement event of configuration and dependent threshold parameter：A3 measurement event.
Step 4：Terminal UE 1 receives recording-related information after this configuration message, measures as follow-up Benchmark, and feed back RRC Connection Reconfiguration Complete.
Step 5：Terminal UE 1, according to the configuration of present operating frequency and flexible bandwidth, determines The test position of PSS/SSS/PBCH, and the PCI information of adjacent area is detected on this position, and Detect PCI20.Find support extension carrier cell list in neighbor measurement information for the PCI20, And the measurement carrier information of Target cell is 11, it is thus determined that this nearby region measurement main carrier of terminal-pair With extension carrier wave.
Step 6：The signal intensity that terminal UE 1 measures Target cell meets trigger condition, therefore To serving base stations report measurement result.Wherein measurement result RSRQ of extension carrier wave and RSRP Adopt 1 independent indications afterwards, represent the differentiation with main carrier measurement result.
Step 7：After serving BS receives, send handover request to CELL11 said target base station (HO Request) message, carries measurement result RSRQ and/or the RSRP of terminal in message, Wherein carry 1 independent indications after the measurement result of extension carrier wave, represent and main carrier measurement knot The differentiation of fruit.
Step 8：After target BS receives, find wherein to carry main carrier and extension carrier wave respectively Measurement result RSRQ and/or RSRP, due to main carrier be subject to adjacent frequency interference higher, because The numerical value of this its RSRQ will be determined significantly lower than the RSRQ value of extension carrier wave, therefore target BS Fixed be placed into terminal extends on carrier wave.
Step 9：Target BS is taken in switching request response (HO Request ACK) message Flexible bandwidth configuration information with target BS and the target selection information being indicated to terminal.Target The frequency point number of target side main carrier, PCI, and 1 bit identification information is comprised in selection information, Wherein 1 bit identification information is used for instruction terminal to be needed to be linked in extension carrier wave.
Step 10:Serving BS after receiving HO Request ACK message, related mesh The flexible bandwidth configuration information of mark base station and the target selection Information Pull switching being indicated to terminal Order is sent to terminal UE 1.
Step 11：After terminal UE 1 receives, according to the frequency configured information in switching command (i.e., 1 bit identification information) it is thus understood that needing to be linked into the extension carrier wave of target BS, and according to mesh The flexible bandwidth configuration information of mark side is directly connected to the extension carrier wave of Target cell.
Application example 3
In this example, terminal UE 1 supports flexible bandwidth.Serving BS supports the bandwidth of 25MHz Setting, target BS supports the setting of 25MHz bandwidth.Current between serving BS and target BS There is no X2 interface, target BS is configured without flexible bandwidth, triggering configuration before certain time point It is indicated to its parameter of serving BS by S1 message afterwards to change.Serving BS contains three Sector, wherein terminal UE 1 are located at the edge of Cell 01.Target BS also contains three sectors, UE1 will be switched to Cell 11.The wherein PCI of Cell 11 is PCI 20.
Step 1：Target BS initiates S1 new information to Mobility Management Entity (MME), Wherein target BS configures in base station and takes in conversion (eNB Configuration Transfer) message Carry following information：
1) bandwidth of main carrier：20MHz
2) total bandwidth of flexible bandwidth：25MHz
3) extend the bandwidth of carrier wave：20MHz
Step 2：After MME receives this message, the configuration information of flexible bandwidth is placed on movement Property management entity configuration conversion (MME Configuration Transfer) message in be indicated to clothes Business base station.
Step 3：Serving BS receive MME Configuration Transfer message it is thus understood that Target BS supports flexible bandwidth configuration, the therefore PCI of three cells that target BS is supported all Arrange in " supporting the cell list of extension carrier wave " of neighbor measurement information.And feed back base station Config update confirms (eNB Configuration Update ACK) message.
Step 4：Serving BS prepares to be switched to terminal UE 1 to extend to be operated on carrier wave, profit It is this terminal flexible configuration bandwidth information with RRC Connection Reconfiguration message And neighbor measurement information.
Wherein flexible bandwidth configuration information has included at least following information：
Bandwidth 20MHz of extension carrier wave；
Total bandwidth 25MHz of flexible bandwidth.
And neighbor measurement information contains following information：
The measurement carrier information of Target cell：11；
There is PCI20 in the Cell ID List supporting extension carrier wave；
The measurement event of configuration and dependent threshold parameter：A3 measurement event.
Step 5：Terminal UE 1 receives recording-related information after this configuration message, measures as follow-up Benchmark, and feed back RRC Connection Reconfiguration Complete.
Step 6：Terminal UE 1, according to the configuration of present operating frequency and flexible bandwidth, determines The test position of PSS/SSS/PBCH, and the PCI information of adjacent area is detected on this position, and Detect PCI20.Find the cell list of the support extension carrier wave in neighbor measurement information for the PCI20 In, and the measurement carrier information of Target cell is 11, therefore determines for this adjacent area for terminal Measurement main carrier and extension carrier wave.
Step 7：The signal intensity that terminal UE 1 measures Target cell meets trigger condition, therefore To serving base stations report measurement result.Wherein measurement result RSRQ of extension carrier wave and RSRP Adopt 1 independent indications afterwards, represent the differentiation with main carrier measurement result.
Step 8：After serving BS receives, send handover request to CELL11 said target base station (HO Request) message, carries measurement result RSRQ and/or the RSRP of terminal in message, Wherein carry 1 independent indications after the measurement result of extension carrier wave, represent and main carrier measurement knot The differentiation of fruit.
Step 9：After target BS receives, find wherein to carry main carrier and extension carrier wave respectively Measurement result RSRQ and/or RSRP, due to main carrier be subject to adjacent frequency interference higher, because The numerical value of this its RSRQ will be determined significantly lower than the RSRQ value of extension carrier wave, therefore target BS Fixed be placed into terminal extends on carrier wave.
Step 10：Target BS is taken in switching request response (HO Request ACK) message Flexible bandwidth configuration information with target BS and the target selection information being indicated to terminal.Target The frequency point number of target side main carrier, PCI, and 1 bit identification information is comprised in selection information, Wherein 1 bit identification information is used for instruction terminal to be needed to be linked in extension carrier wave.
Step 11:Serving BS after receiving HO Request ACK message, related target The flexible bandwidth configuration information of base station and the target selection Information Pull switching life being indicated to terminal Order is sent to terminal UE 1.
Step 12：After terminal UE 1 receives, according to the frequency configured information in switching command (i.e., 1 bit identification information) it is thus understood that needing to be linked into the extension carrier wave of target BS, and according to mesh The flexible bandwidth configuration information of mark side is directly connected to the extension carrier wave of Target cell.
Fig. 7 is the structural representation of the cell handover system that the present invention is used for flexible bandwidth.As Fig. 7 Shown, cell handover system 700 includes serving BS 72, terminal 74 and target BS 76.
Fig. 8 A is the structural representation of 72 1 embodiments of serving BS of the present invention.As Fig. 8 A Shown, serving BS 72 includes：
Neighbor measurement information transmitting element 724, for sending neighbor measurement information to terminal, adjacent Region measurement information includes the measurement carrier information of Target cell and the cell information supporting extension carrier wave, So that terminal determines according to neighbor measurement information, and Target cell is needed with the carrier type of measurement, and Measure；
Measurement result acquiring unit 725, for obtaining the measurement knot of the Target cell of terminal to report Really, the measurement result in Target cell includes the knowledge of carrier type corresponding to each measurement result Other information, carrier type therein includes main carrier and extension carrier wave；
Switching treatmenting unit 726, for judging whether terminal meets switching condition, if terminal is full Sufficient switching condition, the target BS belonging to Target cell sends handover request, in handover request Carry measurement result and the terminal capability of Target cell, so that target BS is in response to handover request, Determined eventually according to the measurement result of Target cell, the bandwidth ability of target BS and terminal capability End needs the carrier wave accessing, and returns handoff response, and in handoff response, carried terminal needs to access The identification information of the carrier type of carrier wave, and expand if identification information represents that terminal needs access Exhibition carrier wave, then also carry the flexible bandwidth configuration information of target BS in handoff response；
Switching command unit 727, for the handoff response returning in response to target BS, sends Switching command, to terminal, is switched over instruction terminal, and switching command carried terminal needs to access The identification information of the carrier type of carrier wave, and expand if identification information represents that terminal needs access Exhibition carrier wave, then also carry the flexible bandwidth configuration information of target BS in switching command, so that eventually End is switched on the corresponding carrier wave of Target cell according to switching command.
Fig. 8 B is the structural representation of another embodiment of serving BS 72 of the present invention.As Fig. 8 B Shown, serving BS 72 also includes：Flexible bandwidth information acquisition unit 721 and nearby region measurement Information determination unit 722 and/or flexible bandwidth information transmitting unit 723；
Flexible bandwidth information acquisition unit 721, the flexible bandwidth for obtaining target BS configures Information；
Neighbor measurement information determining unit 722, for the flexible bandwidth configuration according to target BS Information determines the measurement carrier information of Target cell and the cell information supporting extension carrier wave, wherein If target BS is configured with extension carrier wave, the measurement carrier information of Target cell is configured to measure The main carrier of Target cell and extension carrier wave, if target BS is configured without extending carrier wave, mesh The measurement carrier information of mark cell is configured to measure the main carrier of Target cell；
Flexible bandwidth information transmitting unit 723, the flexible bandwidth for sending target BS configures Information is to terminal, so that terminal is joined according to the flexible bandwidth of present operating frequency and target BS Confidence breath determines the test position of synchronizing signal, or so that terminal is flexible according to target BS Band width configuration information determines the measurement range of extension carrier wave.
Flexible bandwidth information acquisition unit 721, for being connect by X2 interface message or S1 Mouth message or the flexible bandwidth configuration information of network management configuration message acquisition target BS.
Switching treatmenting unit 726 when judging whether terminal meets switching condition, specifically for root Judge whether full according to measurement result and the handoff threshold of carrier type corresponding to each measurement result Sufficient switching condition, wherein, different carrier types is configured with different handoff thresholds.
Fig. 9 A is the structural representation of 74 1 embodiments of terminal of the present invention.As shown in Figure 9 A, Terminal 74 includes：
Measurement result reporting unit 746, for the measurement to Target cell to serving base stations report As a result, the measurement result in Target cell includes the knowledge of the corresponding carrier type of each measurement result Other information, carrier type therein includes main carrier and extension carrier wave, so that serving BS is by mesh The target BS that the measurement result of mark cell is sent to belonging to Target cell switches over decision-making；
Switch unit 747, for the switching command sending in response to serving BS, according to switching Order is linked on the corresponding carrier wave of Target cell, and switching command carried terminal needs access carrier Carrier type identification information, and if identification information represent terminal needs access extension carry Ripple, then also carrying the flexible bandwidth configuration information of target BS in switching command, to be linked into target little On the corresponding carrier wave in area.
Fig. 9 B is the structural representation of another embodiment of terminal 74 of the present invention.As shown in Figure 9 B,
Terminal 74 also includes：Neighbor measurement information acquiring unit 744, for receiving serving BS Send neighbor measurement information, neighbor measurement information include Target cell measurement carrier information and Support the cell information of extension carrier wave；Measurement carrier wave determining unit 745, for surveying according to adjacent area Amount information determines the carrier wave that Target cell is needed with measurement.
Measurement carrier wave determining unit 745, specifically for：If the measurement carrier wave letter of Target cell Breath represents measurement main carrier it is determined that measuring to the main carrier of Target cell；Or if The measurement carrier information of Target cell represents measurement extension carrier wave, and supports to extend the little of carrier wave There is no Target cell it is determined that not measuring to Target cell in area's information；Or if mesh The measurement carrier information of mark cell represents measurement extension carrier wave, and supports to extend the cell of carrier wave There is Target cell it is determined that measuring to the extension carrier wave of Target cell in information；Or such as The measurement carrier information of fruit Target cell represents measurement main carrier and extension carrier wave, and supports to expand There is Target cell it is determined that the main carrier to Target cell and extension in the cell information of exhibition carrier wave Carrier wave measures；Or if the measurement carrier information of Target cell represent measurement main carrier and Extension carrier wave, and support there is no Target cell it is determined that right in the cell information extend carrier wave The main carrier of Target cell measures.
Terminal 74 also includes：Flexible bandwidth information acquisition unit 741 and measurement range determine list Unit 742 and/or synchronous signal detection unit 743；Wherein,
Flexible bandwidth information acquisition unit 741, for receiving the target BS of serving BS transmission Flexible bandwidth configuration information；
Measurement range determining unit 742, for the flexible bandwidth configuration information according to target BS Determine the measurement range of extension carrier wave；
Synchronous signal detection unit 743, for according to present operating frequency and target BS Flexible bandwidth configuration information determines the test position of synchronizing signal.
Figure 10 is the structural representation of target BS 76 of the present invention.As shown in Figure 10, target base Stand and 76 include：
Handover request acquiring unit 762, for receiving the handover request of serving BS transmission, cuts Change carried terminal in request to the measurement result of Target cell and terminal capability, in Target cell Measurement result includes the identification information of the corresponding carrier type of each measurement result, carrier wave therein Type includes main carrier and extension carrier wave；
Switching treatmenting unit 764, for according to the measurement result of Target cell, target BS Bandwidth ability and terminal capability determine that terminal needs the carrier wave accessing, and return handoff response to Serving BS, in handoff response, carried terminal needs the identification information of the carrier type of access carrier, And if identification information represents that terminal needs access extension carrier wave, then also carry in handoff response The flexible bandwidth configuration information of target BS, so that serving BS instruction terminal is in corresponding carrier wave Upper access.
Switching treatmenting unit 764 specifically for：If the bandwidth ability of target BS represents target Base station is configured without flexible bandwidth, or if only has main carrier in the measurement result of Target cell Measurement result, or terminal do not support flexible bandwidth it is determined that terminal need access main carrier； Or if the bandwidth ability of target BS represents that target BS is configured with flexible bandwidth, and mesh Only extend the measurement result of carrier wave in the measurement result of mark cell, and terminal is supported flexibly to carry Width is it is determined that terminal needs to access extension carrier wave；Or if the bandwidth ability table of target BS Show that target BS is configured with flexible bandwidth, and the measurement result of Target cell includes main carrier With extension carrier wave measurement result, and terminal support flexible bandwidth, then according to preset strategy from A carrier wave is selected to be defined as the carrier wave that terminal needs to access in main carrier and extension carrier wave.
Switching treatmenting unit 764 is selecting one according to preset strategy from main carrier and extension carrier wave Individual carrier wave is defined as terminal needs the carrier wave accessing to include：Information on load, money according to each carrier wave At least one information in source occupied information, signal quality information, from main carrier and extension carrier wave The middle carrier wave selecting a carrier wave to be defined as terminal needs access；Or according to being pre-configured with not The precedence information of same type carrier wave, selects a carrier wave to determine from main carrier and extension carrier wave Need the carrier wave accessing for terminal.
Target BS 76 also includes bandwidth ability notification unit, for by X2 interface message, Or flexible bandwidth configuration information is notified service by S1 interface message or network management configuration message Base station, so that serving BS instructs terminal to carry out nearby region measurement according to flexible bandwidth configuration information.
Figure 11 is the structural representation of the cell measurement system that the present invention is used for flexible bandwidth.As figure Shown in 11, cell measurement system 1100 includes serving BS 112 and terminal 114.
Figure 12 is the structural representation of serving BS 112 of the present invention.As shown in figure 12, service Base station 112 includes：
Flexible bandwidth information acquisition unit 1122, the flexible bandwidth for obtaining target BS configures Information；
Neighbor measurement information determining unit 1124, for the flexible bandwidth configuration according to target BS Information determines the measurement carrier information of Target cell and the cell information supporting extension carrier wave, adjacent area Metrical information includes the measurement carrier information of Target cell and the cell information supporting extension carrier wave；
Neighbor measurement information transmitting element 1126, for sending neighbor measurement information to terminal, with Just terminal determines according to neighbor measurement information needs the carrier type of measurement to Target cell.
Neighbor measurement information determining unit 1124 determine Target cell measurement carrier information when, Specifically for：If target BS is configured with extension carrier wave, the measurement carrier information of Target cell It is configured to measure the main carrier of Target cell and extension carrier wave, if target BS is configured without extending Carrier wave, then Target cell measurement carrier information be configured to measure Target cell main carrier.
Flexible bandwidth information acquisition unit 1122, specifically for by X2 interface message or S1 interface message or the flexible bandwidth configuration information of network management configuration message acquisition target BS.
Serving BS 112 also includes：Flexible bandwidth information transmitting unit, for sending target base The flexible bandwidth configuration information stood is to terminal, so that terminal is joined according to the flexible bandwidth of target BS Confidence breath determine extension carrier wave measurement range, or so that terminal according to present operating frequency with And the flexible bandwidth configuration information of target BS determines the test position of synchronizing signal.
Figure 13 A is the structural representation of 114 1 embodiments of terminal of the present invention.As Figure 13 A institute Show, terminal 114 includes：
Neighbor measurement information acquiring unit 1144, for receiving the nearby region measurement of serving BS transmission Information, neighbor measurement information includes the measurement carrier information of Target cell and supports extension carrier wave Cell information；And
Measurement carrier wave determining unit 1145, for determining to Target cell according to neighbor measurement information Need the carrier type of measurement.
Measurement carrier wave determining unit 1145 specifically for：If the measurement carrier information of Target cell Represent measurement main carrier it is determined that measuring to the main carrier of Target cell；Or if mesh The measurement carrier information of mark cell represents measurement extension carrier wave, and supports to extend the cell of carrier wave There is no Target cell it is determined that not measuring to Target cell in information；Or if target The measurement carrier information of cell represents measurement extension carrier wave, and supports to extend the cell letter of carrier wave There is Target cell it is determined that measuring to the extension carrier wave of Target cell in breath；Or if The measurement carrier information of Target cell represents measurement main carrier and extension carrier wave, and supports to extend There is Target cell it is determined that the main carrier to Target cell and extension carry in the cell information of carrier wave Ripple measures；Or if the measurement carrier information of Target cell represents measurement main carrier and expansion Exhibition carrier wave, and support there is no Target cell it is determined that to mesh in the cell information extend carrier wave The main carrier of mark cell measures.
Figure 13 B is the structural representation of 114 1 embodiments of terminal of the present invention.
As shown in Figure 13 B, terminal 114 also includes：Flexible bandwidth information acquisition unit 1141 And measurement range determining unit 1142 and/or synchronous signal detection unit 1143；Wherein,
Flexible bandwidth information acquisition unit 1141, for receiving the target BS of serving BS transmission Flexible bandwidth configuration information；
Measurement range determining unit 1142, for the flexible bandwidth configuration information according to target BS Determine the measurement range of extension carrier wave；
Synchronous signal detection unit 1143, for according to present operating frequency and target BS Flexible bandwidth configuration information determines the test position of synchronizing signal.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can To be completed it is also possible to the hardware being instructed correlation by program is completed by hardware, described journey Sequence can be stored in a kind of computer-readable recording medium, and storage medium mentioned above can be Read only memory, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all this Within the spirit of invention and principle, any modification, equivalent substitution and improvement made etc., all should wrap It is contained within protection scope of the present invention.

Claims (27)

1. a kind of cell switching method for flexible bandwidth, including：
Serving BS sends neighbor measurement information to terminal, and described neighbor measurement information includes target The measurement carrier information of cell and the cell information supporting extension carrier wave, so that terminal is according to described Neighbor measurement information determines the carrier type that Target cell is needed with measurement, and measures；
Serving BS obtains the measurement result of the Target cell of terminal to report, in described Target cell Measurement result include the identification information of carrier type corresponding to each measurement result, therein Carrier type includes main carrier and extension carrier wave；
Serving BS judges whether terminal meets switching condition, if terminal meets switching condition, to Target BS belonging to Target cell sends handover request, carries described mesh in described handover request The measurement result of mark cell and terminal capability, so that target BS is in response to described handover request, According to the measurement result of described Target cell, the bandwidth ability of described target BS and terminal energy Power determines that terminal needs the carrier type accessing, and returns handoff response to serving BS, described In handoff response, carried terminal needs the identification information of the carrier type of access carrier, and if Identification information represents that terminal needs access extension carrier wave, then also carry described in described handoff response The flexible bandwidth configuration information of target BS；
The described handoff response that serving BS returns in response to target BS, send switching command to Terminal, is switched over instruction terminal, and described switching command carried terminal needs access carrier The identification information of carrier type, and if identification information represents that terminal needs access extension carrier wave, Then also carry the flexible bandwidth configuration information of described target BS in described switching command, so that eventually End is switched on the corresponding carrier wave of Target cell according to described switching command.
2. the method for claim 1, also includes：
Serving BS obtains the flexible bandwidth configuration information of target BS；
Serving BS determines the measurement of Target cell according to the flexible bandwidth configuration information of target BS Carrier information and the cell information supporting extension carrier wave, if wherein target BS is configured with extension load Ripple, then the measurement carrier information of Target cell be configured to measure the main carrier of Target cell and extension Carrier wave, if target BS is configured without extending carrier wave, the measurement carrier information of Target cell is joined It is set to the main carrier of measurement Target cell.
3. the method for claim 1, wherein whether described serving BS judges terminal Meet switching condition to include：
Described serving BS is according to measurement result and carrier type corresponding to each measurement result Handoff threshold judges whether to meet switching condition, and wherein, different carrier types is configured with difference Handoff threshold.
4. the method for claim 1, also includes：
Serving BS obtains the flexible bandwidth configuration information of target BS, and is sent to terminal, with Just terminal determines synchronization according to the flexible bandwidth configuration information of present operating frequency and target BS The test position of signal, or so that terminal is true according to the flexible bandwidth configuration information of target BS Surely extend the measurement range of carrier wave.
5. the method as described in claim 2 or 4, wherein, described serving BS obtains target The flexible bandwidth configuration information of base station includes：
Serving BS is disappeared by X2 interface message or S1 interface message or network management configuration Breath obtains the flexible bandwidth configuration information of target BS.
6. a kind of cell switching method for flexible bandwidth, including：
Terminal measurement result to Target cell to serving base stations report, in described Target cell Measurement result includes the identification information of the corresponding carrier type of each measurement result, carrier wave therein Type includes main carrier and extension carrier wave, so that the measurement of described Target cell is tied by serving BS The target BS that fruit is sent to belonging to Target cell switches over decision-making；
The switching command that terminal response sends in serving BS, is linked into according to described switching command On the corresponding carrier wave of Target cell, described switching command carried terminal needs the carrier wave of access carrier The identification information of type, and if identification information represents that terminal needs access extension carrier wave, then The flexible bandwidth configuration information of described target BS is also carried in described switching command.
7. method as claimed in claim 6, also includes：
Terminal receives the neighbor measurement information that serving BS sends, and described neighbor measurement information includes The measurement carrier information of Target cell and the cell information supporting extension carrier wave；
Terminal determines according to described neighbor measurement information needs the carrier wave of measurement to Target cell.
8. method as claimed in claim 7, described terminal is true according to described neighbor measurement information The fixed carrier wave needing measurement to Target cell includes：
If the measurement carrier information of described Target cell represents measurement main carrier it is determined that to mesh The main carrier of mark cell measures；Or
If the measurement carrier information of described Target cell represents measurement extension carrier wave, and described There is no Target cell it is determined that not carrying out to Target cell in the cell information supporting extension carrier wave Measurement；Or
If the measurement carrier information of described Target cell represents measurement extension carrier wave, and described There is Target cell it is determined that the extension to Target cell carries in the cell information supporting extension carrier wave Ripple measures；Or
If the measurement carrier information of described Target cell represents measurement main carrier and extension carrier wave, And there is Target cell it is determined that to Target cell in the described cell information supporting extension carrier wave Main carrier and extension carrier wave measure；Or
If the measurement carrier information of described Target cell represents measurement main carrier and extension carrier wave, And there is no Target cell it is determined that little to target in the described cell information supporting extension carrier wave The main carrier in area measures.
9. method as claimed in claim 6, also includes：
Terminal receives the flexible bandwidth configuration information of the target BS that serving BS sends；
Terminal determines the measurement range of extension carrier wave according to the flexible bandwidth configuration information of target BS.
10. method as claimed in claim 6, also includes：
Terminal receives the flexible bandwidth configuration information of the target BS that serving BS sends；
Terminal determines same according to the flexible bandwidth configuration information of present operating frequency and target BS The test position of step signal.
A kind of 11. cell switching methods for flexible bandwidth, including：
Target BS receives the handover request that serving BS sends, and carries end in described handover request Hold the measurement result to Target cell and terminal capability, in the measurement result of described Target cell Including the identification information of the corresponding carrier type of each measurement result, carrier type therein includes leading Carrier wave and extension carrier wave；
The measurement result according to described Target cell for the target BS, the bandwidth energy of described target BS Power and terminal capability determine that terminal needs the carrier wave accessing, and return handoff response to service base Stand, in described handoff response, carried terminal needs the identification information of the carrier type of access carrier, And if identification information represents that terminal needs access extension carrier wave, then in described handoff response also Carry the flexible bandwidth configuration information of described target BS, so that serving BS instruction terminal is in phase Access on the carrier wave answered.
12. methods as claimed in claim 11, described target BS is according to described Target cell Measurement result, the bandwidth ability of described target BS and terminal capability determine that terminal needs to connect The carrier wave entering includes：
If the bandwidth ability of described target BS represents that described target BS is configured without flexibly carrying Width, or if only having the measurement result of main carrier in the measurement result of described Target cell, or Person's terminal does not support flexible bandwidth it is determined that terminal needs to access main carrier；Or
If the bandwidth ability of described target BS represents that described target BS is configured with flexible bandwidth, And only extend the measurement result of carrier wave in the measurement result of described Target cell, and terminal Support flexible bandwidth it is determined that terminal needs to access extension carrier wave；Or
If the bandwidth ability of described target BS represents that described target BS is configured with flexible bandwidth, And the measurement result of described Target cell includes main carrier and the measurement result of extension carrier wave, And terminal supports flexible bandwidth, then select from main carrier and extension carrier wave according to preset strategy One carrier wave is defined as the carrier wave that terminal needs to access.
13. methods as claimed in claim 12, wherein, target BS according to preset strategy from Selecting a carrier wave to be defined as terminal in main carrier and extension carrier wave needs the carrier wave accessing to include：
Target BS is according to the information on load of each carrier wave, resource occupation information, signal quality information In at least one information, from main carrier and extension carrier wave select a carrier wave be defined as terminal Need the carrier wave accessing；Or
Target BS according to the precedence information of the dissimilar carrier wave being pre-configured with, from main carrier It is defined as the carrier wave that terminal needs to access with selecting a carrier wave in extension carrier wave.
14. methods as claimed in claim 11, also include：
Target BS is disappeared by X2 interface message or S1 interface message or network management configuration Flexible bandwidth configuration information is notified serving BS by breath, so that serving BS is joined according to flexible bandwidth Put information guiding terminal and carry out nearby region measurement.
A kind of 15. base stations, described base station is the current serving BS of terminal, and described base station includes：
Neighbor measurement information transmitting element, for sending neighbor measurement information to terminal, described neighbour Region measurement information includes the measurement carrier information of Target cell and the cell information supporting extension carrier wave, So that terminal determines according to described neighbor measurement information, and Target cell is needed with the carrier type of measurement, And measure；
Measurement result acquiring unit, for obtaining the measurement result of the Target cell of terminal to report, Include the knowledge of carrier type corresponding to each measurement result in the measurement result of described Target cell Other information, carrier type therein includes main carrier and extension carrier wave；
Switching treatmenting unit, for judging whether terminal meets switching condition, if terminal meets cut Change condition, the target BS belonging to Target cell sends handover request, in described handover request Carry measurement result and the terminal capability of described Target cell, so that target BS is in response to described Handover request, according to the bandwidth ability of the measurement result of described Target cell, described target BS And terminal capability determines that terminal needs the carrier wave accessing, and return handoff response, described switching In response, carried terminal needs the identification information of the carrier type of access carrier, and if identification Information represents that terminal needs access extension carrier wave, then also carry described target in described handoff response The flexible bandwidth configuration information of base station；
Switching command unit, for the described handoff response returning in response to target BS, sends Switching command, to terminal, is switched over instruction terminal, and described switching command carried terminal needs The identification information of the carrier type of access carrier, and if identification information represents terminal, needs connect Enter and extend carrier wave, then also carry the flexible bandwidth configuration of described target BS in described switching command Information, so that terminal is switched on the corresponding carrier wave of Target cell according to described switching command.
16. base stations as claimed in claim 15, also include：Flexible bandwidth information acquisition unit And neighbor measurement information determining unit and/or flexible bandwidth information transmitting unit；
Described flexible bandwidth information acquisition unit, the flexible bandwidth for obtaining target BS configures Information；
Described neighbor measurement information determining unit, for the flexible bandwidth configuration according to target BS Information determines the measurement carrier information of Target cell and the cell information supporting extension carrier wave, wherein If target BS is configured with extension carrier wave, the measurement carrier information of Target cell is configured to measure The main carrier of Target cell and extension carrier wave, if target BS is configured without extending carrier wave, mesh The measurement carrier information of mark cell is configured to measure the main carrier of Target cell；
Described flexible bandwidth information transmitting unit, the flexible bandwidth for sending target BS configures Information is to terminal, so that terminal is joined according to the flexible bandwidth of present operating frequency and target BS Confidence breath determines the test position of synchronizing signal, or so that terminal is flexible according to target BS Band width configuration information determines the measurement range of extension carrier wave.
17. base stations as claimed in claim 16, described flexible bandwidth information acquisition unit, use In by X2 interface message or S1 interface message or network management configuration message acquisition target The flexible bandwidth configuration information of base station.
18. base stations as claimed in claim 15, described switching treatmenting unit is judging that terminal is Not no when meeting switching condition, specifically for according to corresponding to measurement result and each measurement result The handoff threshold of carrier type judges whether to meet switching condition, wherein, different carrier type It is configured with different handoff thresholds.
A kind of 19. terminals, including：
Measurement result reporting unit, for the measurement result to Target cell to serving base stations report, Include the identification of the corresponding carrier type of each measurement result in the measurement result of described Target cell Information, carrier type therein includes main carrier and extension carrier wave, so that serving BS will be described The target BS that the measurement result of Target cell is sent to belonging to Target cell switches over decision-making；
Switch unit, for the switching command sending in response to serving BS, according to described switching Order is linked on the corresponding carrier wave of Target cell, and described switching command carried terminal needs to access The identification information of the carrier type of carrier wave, and expand if identification information represents that terminal needs access Exhibition carrier wave, then also carry the flexible bandwidth configuration information of described target BS in described switching command It is linked on the corresponding carrier wave of Target cell.
20. terminals as claimed in claim 19, also include：
Neighbor measurement information acquiring unit, for receiving the neighbor measurement information of serving BS transmission, Described neighbor measurement information includes the measurement carrier information of Target cell and supports the little of extension carrier wave Area's information；
Measurement carrier wave determining unit, for determining to Target cell according to described neighbor measurement information Need the carrier wave of measurement.
21. terminals as claimed in claim 20, described measurement carrier wave determining unit, it is used for：
If the measurement carrier information of described Target cell represents measurement main carrier it is determined that to mesh The main carrier of mark cell measures；Or
If the measurement carrier information of described Target cell represents measurement extension carrier wave, and described There is no Target cell it is determined that not carrying out to Target cell in the cell information supporting extension carrier wave Measurement；Or
If the measurement carrier information of described Target cell represents measurement extension carrier wave, and described There is Target cell it is determined that the extension to Target cell carries in the cell information supporting extension carrier wave Ripple measures；Or
If the measurement carrier information of described Target cell represents measurement main carrier and extension carrier wave, And there is Target cell it is determined that to Target cell in the described cell information supporting extension carrier wave Main carrier and extension carrier wave measure；Or
If the measurement carrier information of described Target cell represents measurement main carrier and extension carrier wave, And there is no Target cell it is determined that little to target in the described cell information supporting extension carrier wave The main carrier in area measures.
22. terminals as claimed in claim 19, also include：Flexible bandwidth information acquisition unit And measurement range determining unit and/or synchronous signal detection unit；
Described flexible bandwidth information acquisition unit, for receiving the target BS of serving BS transmission Flexible bandwidth configuration information；
Described measurement range determining unit, for the flexible bandwidth configuration information according to target BS Determine the measurement range of extension carrier wave；
Described synchronous signal detection unit, for according to present operating frequency and target BS Flexible bandwidth configuration information determines the test position of synchronizing signal.
A kind of 23. base stations, described base station is the target BS that terminal is intended to belonging to switching target small area, Described base station includes：
Handover request acquiring unit, for receiving the handover request of serving BS transmission, described cuts Change carried terminal in request to the measurement result of Target cell and terminal capability, little in described target The measurement result in area includes the identification information of the corresponding carrier type of each measurement result, therein Carrier type includes main carrier and extension carrier wave；
Switching treatmenting unit, for according to the measurement result of described Target cell, described target base The bandwidth ability stood and terminal capability determine that terminal needs the carrier wave accessing, and return switching sound Serving BS should be given, in described handoff response, carried terminal needs the carrier type of access carrier Identification information, and if identification information represents that terminal needs access extension carrier wave, then described cut Change the flexible bandwidth configuration information also carrying described target BS in response, so that serving BS refers to Show that terminal accesses on corresponding carrier wave.
24. base stations as claimed in claim 23, described switching treatmenting unit, it is used for：
If the bandwidth ability of described target BS represents that described target BS is configured without flexibly carrying Width, or if only having the measurement result of main carrier in the measurement result of described Target cell, or Person's terminal does not support flexible bandwidth it is determined that terminal needs to access main carrier；Or
If the bandwidth ability of described target BS represents that described target BS is configured with flexible bandwidth, And only extend the measurement result of carrier wave in the measurement result of described Target cell, and eventually Flexible bandwidth is supported at end it is determined that terminal needs to access extension carrier wave；Or
If the bandwidth ability of described target BS represents that described target BS is configured with flexible bandwidth, And the measurement result of described Target cell includes main carrier and the measurement result of extension carrier wave, And terminal supports flexible bandwidth, then select from main carrier and extension carrier wave according to preset strategy One carrier wave is defined as the carrier wave that terminal needs to access.
25. base stations as claimed in claim 23, described switching treatmenting unit is according to default plan Slightly a carrier wave is selected to be defined as the carrier wave bag that terminal needs to access from main carrier and extension carrier wave Include：
According in the information on load of each carrier wave, resource occupation information, signal quality information at least One information, selecting a carrier wave to be defined as terminal from main carrier and extension carrier wave needs to access Carrier wave；Or
According to the precedence information of the dissimilar carrier wave being pre-configured with, carry from main carrier and extension A carrier wave is selected to be defined as the carrier wave that terminal needs to access in ripple.
26. base stations as claimed in claim 23, also include：
Bandwidth ability notification unit, for by X2 interface message or S1 interface message, Or flexible bandwidth configuration information is notified serving BS by network management configuration message, so that serving BS Terminal is instructed to carry out nearby region measurement according to flexible bandwidth configuration information.
A kind of 27. cell handover system for flexible bandwidth, appoint including claim 15-18 Terminal described in serving BS described in one, any one of claim 19-22 and right will Seek the target BS described in any one of 23-26.
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