CN102160440A - Carrier selection method and carrier adjustment apparatus for tdd home base station - Google Patents
Carrier selection method and carrier adjustment apparatus for tdd home base station Download PDFInfo
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Abstract
A carrier selection method and a carrier adjustment apparatus for a time division duplex (TDD) home base station are provided. The available uplink/downlink frequency resources of the home base station are divided into multiple frequency bands. The carrier selection method includes the following steps: measuring the received signal strength indicator of each of the multiple frequency bands; integrating the measurement result according to the uplink/downlink performance requirement coefficient that is required by the relevant service, in order to obtain the integrated interference level of each frequency band; combining the multiple frequency bands into several frequency band sets according to the channel bandwidth of the home base station itself, with each frequency band set able to be used to form the uplink/downlink channel of the TDD home base station; computing the integrated performance indicator of every frequency band set based on the integrated interference level of each frequency band in each frequency band set; selecting the frequency band set whose integrated performance indicator satisfies predetermined conditions to form the uplink/downlink channel of the home base station, and in this way adjusting the uplink/downlink channel carrier of the home base station.
Description
The carrier frequency selecting method of TDD Home eNodeB and carrier frequency tune bulbul dress Shanxi technical field
The present invention relates to Home eNodeB, in particular it relates to the carrier frequency selecting method and its carrier frequency adjusting apparatus of a kind of TDD Home eNodeB.Background technology
In next generation mobile communication system, under the trend that available frequency resources constantly develop to high band, the problem of solving in-door covering disposes Home eNodeB（Home Base Station H-BS) it would is that an important solution.Due to the uncertainty of user behavior, it is impossible to predict when user can open H-BS, when turn off H-BS and by H-BS be placed in where, therefore the H-BS planning that can not carry out in advance of deployment.This also results in H-BS can produce more serious inter-cell interference (inter-cell interference ICI) during deployment due to configuring improper, can largely influence the Quality of experience of user.Especially in the larger area of inhabitants live's density, the density of H-BS deployment can be than larger, and this problem is particularly evident.
The problem of solving Home eNodeB ICI, if using disturbance coordination method, although because cell coverage area is larger in macrocell, therefore center and edge customer can effectively be distinguished, arrangement in network planning process, different frequency multiplexing factor is used for different user terminals.But, for Home eNodeB, because its coverage is smaller, therefore user can not be made a distinction.And it can not apply disturbance coordination method due to the prior network planning can not be carried out.
And if using frequency scheduling method, when Home eNodeB detects interference, it can use the mode of frequency scheduling come for the less Radio Resource of user terminal distribution interference.But when disturbing more serious so that it cannot during by dispatching to handle, user terminal can only be switched in the less cell of interference.However, allowing to find the Target cell of switching, extra overhead still can be produced between Home eNodeB or between Home eNodeB and core net, and the continuity of user terminal communication can also be interfered.
In addition, the disturbance restraining method of existing Home eNodeB is mainly based upon Power Control, this scheme has been proved to the interference problem for being difficult to solve the wireless communication system based on OFDM technology in macrocellular is coordinated, and air interface technologies for being based on OFDM that next generation mobile communication system is mainly used.
Therefore, for Home eNodeB, above-mentioned existing method can not reach preferable effect.
Because the frequency spectrum resource that next generation mobile communication system needs can be dramatically increased, for macro cell base station (Macro Base Station M-BS), it could even be possible to needing 100MHz frequency resource.In view of terminal band
The difference of wide ability and macro cell base station, and Home eNodeB application scenarios, and Home eNodeB bandwidth ability largely by its service user terminal（User Terminal UT) bandwidth ability the characteristics of determine, Home eNodeB can be less than macro base station to the demand of frequency resource.It therefore, it can in available frequency resources selectively selected part frequency resource and determine the carrier frequency of oneself, service is provided for terminal, while effectively reduction ICI, improve the spectrum efficiency and handling capacity of system.
And for the Home eNodeB of tdd mode, realize that the selection of frequency resource needs to solve problems with：Uplink downlink uses identical band operation in TDD system, therefore frequency range adjustment can produce influence simultaneously on uplink downlink；
Although having reciprocity for TDD up-downgoing multipath fading channels, the interference source of TDD system uplink downlink is different, and the interference being subject to is also distinguishing.During Frequency Band Selection is operated, it is impossible to while ensureing that uplink interference is small in a frequency range, descending interference is also certain small；For different kinds of business, uplink downlink performance is otherwise varied on the significance level that systematic function influences, it is necessary to consider；
Determine that the standard comparing of frequency resource selection is difficult.
Accordingly, there exist a kind of demand of the carrier frequency adjusting apparatus to providing automatic carrier frequency system of selection that can effectively suppress minizone/inter base station interference in the deployment of TDD Home eNodeB and corresponding TDD Home eNodeB.The content of the invention
It is an object of the invention to provide a kind of carrier frequency selecting method of Home eNodeB and its carrier frequency adjusting apparatus, it can effectively suppress minizone/inter base station interference during Home eNodeB deployment, while realizing the optimization to frequency resource utilization rate.
In one aspect of the invention, it is proposed that a kind of carrier frequency selecting method of TDD Home eNodeB, the Uplink/Downlink available frequency resources of the TDD Home eNodeB are divided into multiple frequency ranges, and the carrier frequency selecting method comprises the following steps：Measure the received signal strength index of each frequency range in the multiple frequency range；The performance requirement coefficient of Uplink/Downlink is integrated to measurement result according to related service, to obtain the integrated interference level of each frequency range；According to the TDD Home eNodeB channel width of itself, the multiple frequency range is constituted into multiple frequency range set, wherein each frequency range set can be used for the Uplink/Downlink channel for constituting the TDD Home eNodeB；Integrated performance index based on each frequency range set of integrated interference level calculation of each frequency range in each frequency range set；The frequency range set that selection integrated performance index meets predetermined condition constitutes the Uplink/Downlink channel of the TDD Home eNodeB, so as to the carrier frequency of the Uplink/Downlink channel that adjusts the TDD Home eNodeB.
Preferably, the measuring process is measured including the received signal strength index for each frequency range in the multiple frequency range of uplink measurement and for the received signal strength index of each frequency range in the multiple frequency range of downlink measurement.
Preferably, the Ce Liang Walk include suddenly：Complete voluntarily to complete the measurement for downlink for the measurement of downlink or by the TDD Home eNodeB by user terminal, and the measurement for up-link is voluntarily completed by the TDD Home eNodeB.
Preferably, the measuring process includes：Received signal strength index to each frequency range in the multiple frequency range is taken multiple measurements, and the value repeatedly measured is averaged, and is used as the measurement result.
Preferably, the measuring process be the TDD Home eNodeB for the first time install or restart when the carrier frequency choice phase perform；And the integrated interference level refers to;, coefficient is required to the initial performance of Uplink/Downlink according to business, the received signal strength index measurement result to each frequency range carries out integrating the obtained comprehensive evaluation index to each band interference level.
Preferably, the initial performance of Uplink/Downlink requires that coefficient is determined by the Uplink/Downlink bandwidth resources demand of the business of minimum performance requirement ratio shared in total bandwidth resources demand and/or Uplink/Downlink mass change for the influence degree of the QoS of survice of minimum performance requirement.
Preferably, the measuring process is to perform carrier frequency choice phase in the TDD Home eNodeB continuous service；And the integrated interference level refers to the performance requirement coefficient according to business to Uplink/Downlink, the received signal strength index measurement result to each frequency range carries out integrating the obtained comprehensive evaluation index to each band interference level.
Preferably, the Uplink/Downlink bandwidth resources demand for the business that the performance requirement coefficient of Uplink/Downlink is carried by TDD Home eNodeB ratio shared in total bandwidth resources demand and/or upper/downlink quality change are determined for the influence degree of the QoS of survice of TDD Home eNodeB carrying.
Preferably, integrated performance index refers to, the interference level synthetic basis of evaluation for each frequency range set that the integrated interference level based on each frequency range in each frequency range set is obtained.
Preferably, the measuring process be the TDD Home eNodeB for the first time install or restart when the carrier frequency choice phase perform；And the selection step includes：It is better than the frequency range set of predetermined initial start threshold value if there is integrated performance index, then selects the optimal frequency range set of integrated performance index to constitute the Uplink/Downlink channel of the TDD Home eNodeB.
Preferably, it is better than the frequency range set of predetermined initial start threshold value if there is no integrated performance index, then etc. after scheduled backoff period, then re-executes the carrier frequency choice phase.
Preferably, it is described wait more than pre-determined number in the case of, re-execute the carrier frequency choice phase after scheduled period is waited, and the predetermined period is more than the predetermined backoff period.
Preferably, the measuring process is to perform carrier frequency choice phase in the TDD Home eNodeB continuous service；And the selection step includes：It is better than the frequency range set of intended service performance threshold if there is integrated performance index, then selects the optimal frequency range set of integrated performance index to constitute the Uplink/Downlink channel of the TDD Home eNodeB.
Preferably, described method also includes：Regularly start the measuring process according to the predetermined cycle；Or occur starting the measuring process during scheduled event.
Preferably, described method also includes：There is scheduled event, and determining that the TDD Home eNodeB waits random time interval first, then restarts the measuring process when starting the measuring process.
Preferably, it is better than the frequency range set of intended service performance threshold if there is no integrated performance index, then etc. after scheduled backoff period, then re-executes the carrier frequency choice phase.
Preferably, it is described wait more than pre-determined number in the case of, re-execute the carrier frequency choice phase after scheduled period is waited, and the predetermined period is more than described predetermined backoff period.
Preferably, described method also includes：After the carrier frequency of Uplink/Downlink channel of the TDD Home eNodeB is adjusted, selected frequency range set and carrier frequency adjustment information are indicated to user terminal.
Preferably, the division of the available frequency resources is the channel width for the user terminal that the wireless access technology according to used in the TDD Home eNodeB itself can support type and divided.
In another aspect of this invention, it is proposed that a kind of carrier frequency adjusting apparatus of TDD Home eNodeB, the Uplink/Downlink available frequency resources of the TDD Home eNodeB are divided into multiple frequency ranges, and the carrier frequency adjusting apparatus includes：Measuring unit, measures the received signal strength index of each frequency range in the multiple frequency range；Comprehensive unit, is integrated according to related service to the performance requirement coefficient of Uplink/Downlink to measurement result, to obtain the integrated interference level of each frequency range；Frequency range set designating unit, according to the TDD Home eNodeB channel width of itself, constitutes multiple frequency range set, wherein each frequency range set can be used for the Uplink/Downlink channel for constituting the TDD Home eNodeB by the multiple frequency range；Computing unit, the integrated performance index based on each frequency range set of integrated interference level calculation of each frequency range in each frequency range set；Selecting unit, the frequency range set that selection integrated performance index meets predetermined condition constitutes the Uplink/Downlink channel of the TDD Home eNodeB, so as to the carrier frequency of the Uplink/Downlink channel that adjusts the TDD Home eNodeB.
Preferably, the measuring unit includes being used for for the uplink measurement module of the received signal strength index of each frequency range in the multiple frequency range set of uplink measurement and for many described in downlink measurement
The downlink measurement module of the received signal strength index of each frequency range set in individual frequency range.
Preferably, the measuring unit also includes averaging module, is averaged for the value respectively to the multiple measurement of the uplink measurement module and downlink measurement module, is used as the measurement result.
Preferably, when the TDD Home eNodeB is installed or restarted for the first time, it is better than the frequency range set of predetermined initial start threshold value if there is integrated performance index, then the selecting unit selects the optimal frequency range set of integrated performance index to constitute the Uplink/Downlink channel of the TDD Home eNodeB.
Preferably, in the TDD Home eNodeB continuous service, it is better than the frequency range set of intended service performance threshold if there is integrated performance index, then the selecting unit selects the optimal frequency range set of integrated performance index to constitute the Uplink/Downlink channel of the TDD Home eNodeB.
Preferably, the carrier frequency adjusting apparatus of the TDD Home eNodeB also includes：Start unit, for regularly starting the measuring unit according to the predetermined cycle and/or starting the measuring unit when current uplink/downlink channel quality is less than predeterminated level.
Preferably, the carrier frequency adjusting apparatus of the TDD Home eNodeB also includes：Indicating member, frequency range from the carrier frequency adjusting module selection to user terminal and adjustment information for indicating, to allow the user terminal correspondingly to adjust channel.
Preferably, the carrier frequency adjusting apparatus of described TDD Home eNodeB also includes：Resource division unit, can support for the wireless access technology according to used in the TDD Home eNodeB itself channel width of the user terminal of type to realize the division of the frequency resource.
Using such scheme, selectively selected part frequency resource and the carrier frequency of oneself can be determined in available frequency resources, service is provided for terminal, while effectively reduction ICI, improved the spectrum efficiency of system and gulp down
Brief description of the drawings
Detailed description according to the accompanying drawings, above and other feature and advantage of the invention will become apparent from, wherein-Fig. 1 shows the structural representation of the carrier frequency adjusting apparatus in Home eNodeB according to embodiments of the present invention；
Fig. 2 shows the schematic flow sheet of the operating process when TDD Home eNodeB according to embodiments of the present invention is installed or restarted for the first time；
Fig. 3 shows the stream of the operating process in TDD Home eNodeB continuous service according to embodiments of the present invention
Journey schematic diagram；
Fig. 4 is provided when automatic carrier frequency system of selection according to embodiments of the present invention is not used, and TDD Home eNodeB is used with macro cell base station in the case of entirely different frequency resource, the Uplink/Downlink coverage rate result signal of Home eNodeB；
Fig. 5 is provided when automatic carrier frequency system of selection according to embodiments of the present invention is not used, and TDD Home eNodeB is using under the component frequency resource situation of macro cell base station, and the Uplink/Downlink coverage rate result of Home eNodeB is unexpectedly；
Fig. 6 provide it is physically continuous in the case of system frequency resource division signal；
Fig. 7 provide it is physically discontinuous in the case of system frequency resource division signal；
Fig. 8 is the schematic diagram of the explanation operating process when TDD Home eNodeB is installed or restarted for the first time according to embodiments of the present invention；
Fig. 9 is the another exemplary schematic diagram of the explanation operating process when TDD Home eNodeB is installed or restarted for the first time according to embodiments of the present invention；
Figure 10 be explanation it is according to embodiments of the present invention when TDD Home eNodeB is installed or restarted for the first time, the another exemplary schematic diagram of the operating process in the case of available frequency resources are physically discontinuous；Figure 11 is the illustrative diagram of the explanation operating process in TDD Home eNodeB continuous services according to embodiments of the present invention；And
Figure 12 is the another exemplary schematic diagram of the explanation operating process in TDD Home eNodeB continuous services according to embodiments of the present invention.Embodiment
Below, the preferred embodiment of the present invention is described in detail with reference to the accompanying drawings.In the accompanying drawings, although be shown in different accompanying drawings, but identical reference be used for represent identical or similar component.For clarity and conciseness, the detailed description comprising known function and structure herein will be omitted, and otherwise they will make subject of the present invention unclear.
Fig. 1 shows the structural representation of the carrier frequency adjusting apparatus in TDD Home eNodeB according to embodiments of the present invention.
As shown in Figure 1, in carrier frequency adjusting apparatus in TDD Home eNodeB according to embodiments of the present invention, resource division unit 102 is according to requirement of system design, and the supported all types of user terminal channel widths of wireless access technology used in Home eNodeB itself, available frequency resources are divided into multiple frequencies
Section.Measuring unit 103 divides the received signal strength index of each frequency range in obtained multiple frequency ranges to resource division unit 102（Band-Received Signal Strength Indicator are measured.Specifically, in measuring unit 103 uplink measurement module measurement uplink channel and downlink measurement module measurement downlink channel B-RSSL measuring units 103 in averaging module the up-link-^S5 repeatedly measured can be averaged, be used as the ^- of the linkSS/, and the downlink B-RSSI repeatedly measured is averaged, it is used as the B-RSSL of the link
Embodiments in accordance with the present invention, in Home eNodeB continuous running phases, start in the form of the measurement process of measuring unit 102 can be triggered by start unit 101 with event or in the form of the cycle.
It is described above up-link-i5S/ and downlink ^- Λ 55 are in the example of family's base station side measurement.Alternately, in Home eNodeB continuous running phases, Home eNodeB can also be fed back in subscriber terminal side measurement downlink B-RSSL and then by feedback channel.
Each frequency range that comprehensive unit 104 is measured measuring unit is integrated.For example, according to the Uplink/Downlink performance parameter of initial setting up, or requirement parameter of some business to Uplink/Downlink performance in the process of running, to the S-AXS/ measurement results of each frequency range（Including ^ _/5 and ^-integrated, the synthesis thousand for obtaining each frequency range disturbs level (/ tegrated ^JSS//5J5Si).The combined process will be described in detail below.
Then, multiple frequency ranges are constituted corresponding frequency range set by division of the frequency range set designating unit 105 based on resource division unit 102 to available frequency resources, and these frequency range set are likely to become the TDD Uplink/Downlink channels of the Home eNodeB.The integrated interference level for each frequency range that computing unit 106 is provided according to comprehensive unit, calculates the integrated performance index IPI of each frequency range set.
Next, selecting unit 107 selects suitable frequency range set according to predetermined condition according to the performance indications of each frequency range set of calculating from multiple frequency range set, for constituting Uplink/Downlink channel.After it have selected corresponding frequency range set, frequency range of the adjustment unit 108 in the frequency range set is adjusted to the carrier frequency of the Uplink/Downlink of Home eNodeB.In addition, the information and adjustment information of the frequency band set of selection are sent to user terminal by indicating member 109 so that user terminal can do corresponding adjustment to the adjustment of carrier frequency according to Home eNodeB in time.
TDD H-BS initial deployments or when turning back on, it is necessary to pass through foundation of the interference level measurement to available frequency resources as the initialization for completing carrier frequency.Fig. 2 shows the schematic flow sheet of the operating process when TDD Home eNodeB according to embodiments of the present invention is installed or restarted for the first time.
As shown in Fig. 2 in step S101, resource division unit as described above divides the frequency resource of system
Into multiple frequency bands.In the rapid S102 of Walk, the UT minimum performance requirements supported using system as target, define an initial start threshold value Th-initial (e.g., with using should most robust Modulation and Coding Scheme when, the interference strength that system can bear）.
In step S103, determine that the business of UT minimum performance requirements requires coefficient (Initial Uplink Performance Requirement IUPR and Initial Downlink Performance Requirement IDPR) for the initial performance of TDD system Uplink/Downlink, IUPR represents to require coefficient to the initial performance of up-link, can be expressed as _,, wherein (Xu—haskThe uplink bandwidth resources demand of the business of minimum performance requirement ratio shared in total bandwidth resources demand is represented, QoS of survice (service quality of the uplink quality change for minimum performance requirement is represented）Influence degree； HDPRepresent to require coefficient to the initial performance of downlink, can be expressed as Λ (,), wherein ^ represents the downlink bandwidth resource requirement of the business of minimum performance requirement ratio shared in total bandwidth resources demand, represents influence degree of the downlink quality change for the QoS of survice of minimum performance requirement.
In step S104, measuring unit 103 measures B-RSSI (including the J of each frequency rangeS¾^B B—RSSI^.
In step S105, comprehensive unit 104 is according to/f/Pi//D i, to the measurement result of each frequency range（Including ^J55uAnd SJi＆Sd) integrated, obtain the integrated interference level (egmtei) of each frequency range BJtSSI IB—RSSI).
In step S106, after the Ji S/ of each frequency range are obtained, the channel width that then frequency range set designating unit 105 needs according to H-BS, based on multiple frequency ranges of division, constitute multiple frequency range set, each frequency range set may be constructed H- BS Uplink/Downlink channel, and integrated performance index/P/ of each frequency range set is then calculated by computing unit 106.
In step S107, selecting unit 107 by obtain each/P/ values are contrasted with initial start threshold value.If there is the initial start threshold value that for example low noon for meeting initial start threshold requirement is predetermined, then in step S112, selecting unit 107 chooses the Uplink/Downlink channel that wherein // minimum frequency range set constitutes H-BS, the initialization of Uplink/Downlink carrier frequency is completed, enters normal working condition in step S113.
Judge whether the number of times retried exceedes predetermined number of times in step S108 if in the absence of the IP1' for meeting initial start threshold requirement.
If be not above, in step S109, H-BS needs to wait backoff time as defined in one section, then measures and contrast.Retreating more than after stipulated number, in step S110, H-BS needs prompting not work, into holding state, waiting the time as defined in one: Γ2 (Γ2>After Π), self-configuring process is reattempted to.
Successfully started up in TDD H- BS, after start-up operation, the measurement scheduling of the interference level of each frequency range divided to available frequency resources can be triggered by two ways：Periodic manner and event driven manner.
In continuous running phases, H-BS needs to obtain the integrated performance index IPI of frequency range set using obtained measurement result, is used as the synthetic basis of evaluation of frequency range set interference level.
As shown in figure 3, in step S 114, start unit 101 judges whether to trigger measuring condition, if do not triggered, system works in S115.
If triggering measuring condition, in step S 116, start unit 101 determines whether that event driven manner is triggered.If it is, the rapid S 117 of Walk, the selection random back time of start unit 117, are kept out of the way.Otherwise, in step S118, the UT serviced according to current system minimum QoS demand defines a service feature threshold value Th-we (such as, reaching the coverage that currently selects, and when can support the minimum QoS demand needed for the UT of current H-BS service, the interference strength that system can bear）.
In step S119, it needs to be determined that performance requirement coefficient (Uplink Performance Requirement UPR and Downlink Performance Requirement DPR) of the business that currently carries of H-BS for TDD system Uplink/Downlink, UPR represents the performance requirement coefficient to up-link, can be expressed as§, β, -) ' the uplink bandwidth resources demand for the business that H-BS is carried ratio shared in total bandwidth resources demand is wherein represented, represent influence degree of the uplink quality change for the H-BS QoS of survice carried；DPR represents the performance requirement coefficient to downlink, can be expressed as grf(, A ...), wherein representing the downlink bandwidth resource requirement of the business of H-BS carryings ratio shared in total bandwidth resources demand, represent influence degree of the downlink quality change for the H- BS QoS of survice carried.
Here the Uplink/Downlink of the embodiment of the present invention is set（Initially）Performance requirement coefficient is determined using same map relation, is differed only in different for the parameter of mapping.The concrete form of mapping relations is expressed as follows：
/(■■■) = -) = fA-) = gtl(-)=gA-) wherein ^ represents parameter x, for y influence degree, and! „, = 1, 0≤ „≤1.Such as M=2.^ represents influence degree of the bandwidth demand for performance requirement coefficient, χ2Represent influence degree of the link-quality for performance requirement coefficient.Assuming that for TDD Home eNodeB, shadow of the bandwidth demand for performance requirement coefficient
Sound is some larger, because the business for having 70% of TDD Home eNodeB h carryings is tightened up to bandwidth demand requirement, and insensitive for transmitting error caused by declining due to link-quality.=0.7 ,=0.3 can so be determined.So as to obtain Uplink/Downlink（Initially）The concrete form of performance requirement coefficient is：u = fu A,— ) = 0.7 · uj!aslc + 0.3 · β, d =Fd)= 0.7 · ad_hasic + 0.3. A—
u = gu (α„ ,^„) = 0.7·α„ +0.3· β,,
^ = ¾(¾^</)=0.7- ,+0.3-^ and according to above-mentioned to α ' ad—b ' fid—w au , βυ , ad, A definition, it can be assumed that：
^ujasic + ad_bThe parameter that the u+d of asic=^ ' one=^ ' i.e. Uplink/Downlinks are defined in pairs, such as：With A and, sum is 1.In step S120, measuring unit 103 measures the 3-^5 of each frequency range/(include the B-RSS and the 3J of downlink of up-link>¾).
In step S121, comprehensive unit 104 is according to UPR/DPR, to Λ ^/measurement result of each frequency range（Including up-link
Progress with downlink is integrated, and obtains each frequency range IB-RSSI.
In step S122, after each frequency range is obtained, then frequency range set designating unit 105 is according to H-BS channel width, based on multiple frequency ranges of division, constitute multiple frequency range set, each frequency range set may be constructed H-BS Uplink/Downlink channel, and computing unit 106 calculate obtain integrated performance index/corpse of each frequency range set/.
In step S123, selecting unit 107 by obtain each // service feature threshold value of the value with setting before contrasted.
If there is meet service feature threshold requirement /P/, then in step S124, selecting unit 107 chooses the Uplink/Downlink system channel that the best frequency range set of wherein/P/ constitutes H-BS.The carrier frequency of the Uplink/Downlink of the adjustment Home eNodeB of adjustment unit 108, and the adjustment information of the broadcast channel of indicating member 107, so that UT adjusts system channel in the defined time.In step S125, the adjustment of Uplink/Downlink system channel is completed, into normal working condition.
If in the absence of the IPI for meeting threshold requirement, judging whether the number of times retried exceedes predetermined number of times in step S126.
If be not above, in step S129, H-BS need wait one section as defined in backoff time measure and contrast again.Retreating more than after stipulated number, in step S127, H-BS needs prompting not work, into holding state, in step S128, waiting time Γ as defined in one section2 ( Γ2>Γ) after, reattempt to self-optimizing process.
Embodiments in accordance with the present invention, for periodic manner, the cycle of measurement scheduling can be second level or ten seconds levels, to avoid the overhead for excessively frequently measuring increase system., can be on current for event driven manner（Under）Row channel quality starts measurement when being less than prescribed level.It is determined that after triggering measurement process, H-BS needs to select a random back-off time, and Jian begins to enter measurement process again after work a period of time, measures while starting to avoid multiple H-BS interfered and causes the distortion of measurement result.
It is emphasized that the frequency resource that TDD H-BS Uplink/Downlink is used can be symmetrical, i.e., Uplink/Downlink uses identical frequency resource.Can also be asymmetrical, i.e., a part for down-link frequencies resource is used only in up-link, or conversely.This all without influence this programme implementation.Further the possible example of scheme proposed by the present invention will be discussed below.For convenience of description, given here is the symmetrical implementation of Uplink/Downlink frequency resource, and this and without prejudice to scheme proposed by the present invention are applied to the asymmetrical situation of Uplink/Downlink frequency resource.
The selection of H-BS interference scenes and metering system
During H-BS deployment, M-BS all or part of frequency resource can be used, the frequency resource orthogonal with M-BS can also be used, the configuration mode of this frequency resource can be determined by operator.
In the case of using the frequency resource orthogonal with M-BS for H-BS, main interference is present between H-BS.Due to H-BS transmission power in terms of limitation, its maximum transmission power differs very little with terminal, in 3dB or so.In this case, by emulation experiment it can be seen that, under different H-BS coverage densities, as indicated at 4, what Fig. 4 (a) and Fig. 4 (b) were represented respectively is downlink coverage rate and up-link coverage rate, i.e. 5 Ni>5dB region.In the case of orthogonal frequency resources use, between H-BS, the interference of uplink downlink, the influence covered for system is substantially coincident, in this case, it is only necessary to carry out the i.e. approximate disturbance regime for obtaining downlink of out-hole run.HUT in figure represents the UT serviced by H-BS.
In the case of all or part of frequency resource for H-BS using M-BS, because M-BS can also produce interference to H-BS, therefore uplink downlink interference has certain difference for the influence of systematic function.As shown in Figure 5.In the case where H-BS and M-BS are with frequency, because M-BS is obvious to the interference of H-BS downlinks, the disturbance regime of H-BS downlinks and the disturbance regime of up-link are otherwise varied, in this case, need while after acquisition up-link and the measurement result of downlink, just can determine that the overall disturbance regime of system.
But it can see from the assessment result of two kinds of interference scenes, regardless of whether considering the influence of the interference from M-BS, with the increase of H-BS deployment densities, the coverage rate disturbed for H-BS, which can be produced, to be significantly affected.It should be noted that Fig. 4 and the assessment result in Fig. 5 are only under two kinds of different frequency resource configuration modes of explanation, the difference of system interference situation, not using carrier frequency selection technique of the present invention.
Frequency resource is divided
If the frequency resource total amount that system allows H-BS to use is B, withminThe elementary cell divided as frequency resource, such as can use the greatest common divisor conduct of the supported all types of user terminal channel widths of wireless access technology used in H-BSlin, the frequency resource of system is divided into N parts, B B2, . · .,
BN, N=~ ^-, B^B2-, ..., =B^BminIt can be continuous or discontinuous to allow the frequency resource used.What Fig. 6 was provided be system frequency resource it is physically continuous in the case of frequency resource division, if the frequency resource that system allows is 60MHz, what Fig. 6 (a) was represented be the minimum channel bandwidths that use of UT for 10MHz when frequency partition, Fig. 6 (b) expressions be the minimum channel bandwidths that use of UT for 20MHz when the frequency resource division that generates.What Fig. 7 was provided be system frequency resource it is physically discontinuous in the case of, the division of frequency resource.The division of frequency resource is determined that the division that different H-BS is determined is probably different by H-BS.
Self-configuring of TDD Home eNodeB carrier frequency selection when including initial deployment or turning back on and successfully start up ^ points of content of self-optimizing two after start-up operation.
Carrier frequency self-configuring
N number of frequency range is obtained after H-BS resource division unit 102 determines the division to available frequency resources, H-BS measuring unit 103 needs to measure the ^^ and B-RSS of each frequency range of division.After measurement result is obtained, is provided according to the business of UT minimum performance requirements for uplink downlink
The initial performance in source requires coefficient/t ^ //Z), calculate and obtain/5_ Λ.ISS/ result of calculations are used as the index for evaluating each band interference level.
If the channel width of H- selections is 3Η-Β5, then need the individual frequency range in available frequency resources to constitute H-BS channel.H-BS, need to select from multiple frequency ranges in Continuous Band/Ρ/minimum gather to constitute the channel of oneself.
For example, system allows H-BS, the frequency resource used is 80MHz cline frequencies.The greatest common divisor of all channel width types that the UT that H-BSi is supported can be supported is 20MHz, if the channel width of H-BSi selections is 40MHz, and frequency resource can be divided into composition, H-BS, pair ..., ^ measurement result it is as shown in table 1.
The H-BS of table 1 ,-^ST measurement results
Frequency range B, B2 B3
B-RSSIu(dBm) -91 -91 -90 -81 B-RSSId(dBm)-92-91-91-83 IB-RSSI (dBm)-91.7-91-90.7-82.4 here, if IUPR and IDPR are represented by w and d respectively：
, ' '), ...).
Constraints is：And 0<M<1,0<d<l.If w=0.25, dU then a frequency range/J^S/ can be expressed as：
Mono- RSSI of IB=Un2 log (w ■ log 2lin (B_ RSSI)+d- og2lin (B-RSSId )) ,
And have： y = log2lin(x) = \0
^ = /w21og(x) = 10-log10(x), xe (0
According to H-BS, the channel width of selection is, it is necessary to which two continuous frequency ranges could constitute H-BS!Channel, i.e. corpse 2, it is therefore desirable to calculate the frequency range set that two Continuous Bands are constituted /P/, as a result as shown in table 2, the method that computing unit calculates H is：
IPIk..., Ν-rii+l ,/numbered for H-BS.
The H-BS of table 2 ,/corpse/
Frequency range set Bi＆B2 B2 3&
7P/(dBm) -88.3 -87.8 -81.8
From-5^/uCan see with B-RSS measurement result and IB-RSSI and IPI result of calculation, interference level it is higher, it is likely that by a channel width for 20MHz H-BS take.If the initial start threshold value Th-initial determined according to UT minimum performance requirements is -82dBm.It can see according to IPI result of calculation,!T _ J ^'a/ are below with ＆ and ＆ and ＆ the band interference level constituted, but are minimum, 11-83 with ＆ P/|The two frequency ranges are selected to be used as the channel of oneself, so that it is determined that carrier frequency, as shown in Figure 8.If as described above, can not find/frequency ranges of the P/ less than 7 j W, it is necessary to the one section of stipulated time that retracts carry out the frequency range for detecting whether to have the condition that meets again.Retreating more than after stipulated number, H-BSi will point out to work, into holding state.
In H-BS, complete self-configuring and successfully start shooting after work, if with H- BS, a neighbouring H-BS2Also begin to carry out self-configuring preparation Jian machines.
Let it be assumed, for the purpose of illustration, that system allows H-BS2The frequency resource used is identical with H- BSt. H-BS2Channel width and H-BS that the UT of service is supported2The channel width of selection also with H-BS, then identical, H-BS2To the division of available frequency resource also with H-BS, it is identical.It should be noted that, it is identical that actual conditions are not required for different H-BS configurations, because different H-BS there may be difference in terms of ability, may also be different due to H-BS priority, system allows the frequency resource used also different, simply these differences on set forth herein method implement do not result in influence.If H-BS2To, 54Measurement result it is as shown in table 3.
The H-BS of table 32B-RSSI 1 then measure result
Frequency range
B2 B,
B-RSSIa(d m) -84 -82 -91 -83
B-RSSId{dBm) -83 -83 -91 -82
IB-RSSI (d m)-83.2-82.7-91-82.2 is according to H-BS2The bandwidth mode of selection is, it is necessary to which two continuous frequency ranges could constitute H-BS2System channel, i.e. ,=2, therefore/P/ result is as shown in table 4.
The H-BS of table 42IPI
Frequency range set Β ＆ Β2 Β2&Β3 Β3 & β4
IPI (dBm)-79.7-82.1-81.7 is from B-RSSIUIt can see with B-RSSk measurement result and IB-RSSI and IPI result of calculation, Β χ and ＆ are in H-BS!Interference level is obviously improved after start work.But ＆ and B3/ Ρ/meet Th " niticd requirement, thus while ＆ frequency ranges are by H-BS!Take, only also in idle condition, H-BS2
Still ＆ and the two frequency ranges can be selected to constitute the channel of oneself, so that it is determined that carrier frequency.As shown in Figure 8.If can not find/P/ is less than:_ j ' W frequency range, H-BS2 needs the frequency range for one section of stipulated time of rollback carrying out detecting whether to have the condition that meets again.Retreating more than after stipulated number, H-BS2 will point out to work, into holding state.
It should be noted that in the present embodiment, what is provided is the situation of frequency resource continuous dispensing, that is, the frequency range for constituting frequency range set is physically continuous.In the case of for the discrete distribution of frequency resource, that is, the frequency range for constituting frequency range set is only logically continuous, without physically continuously, method proposed by the present invention is equally applicable.
Equally with H-BS!Exemplified by, if available frequency resources are the discontinuous frequencies of 80MHz.Frequency resource be still divided into but with ..., physically discontinuous between ^, if Η-Β 8^^ Α, ＆, ^ measurement result are as shown in table 1, // result of calculation is as shown in table 2.Then the result of carrier frequency selection is as shown in Figure 10.
Carrier frequency self-optimizing
As described above, it periodically can also be event driven that the trigger mechanism of the measurement in self-optimizing stage and carrier frequency selection, which can be,.It should be noted that needing to avoid the H-BS interfered while abandoning currently used frequency range in the self-optimizing stage, because once there is part H-BS to have selected other frequency resources as channel, the interference of current frequency range will be alleviated.For by the way of periodic triggers, because the start between Η-BS is that the measurement that orthogonal, different H-BS is used and carrier frequency selection cycle may also be different, therefore the appearance of such case can be largely avoided.But for use event driven mode, the H-BS interfered may and meanwhile find interference presence, in order to avoid they simultaneously adjust, it is necessary to H-BS detect interference enter adjustment flow after, first select a random back-off time.
During self-optimizing, it might as well assume that H-BSi starts carrier frequency selection first（It is probably the ratio H-BS that H-BSi measurement and update cycle arrive2Early, it is also possible to which that the random back-off time of selection is shorter, this depends on 11-：681The carrier frequency selection trigger mechanism of use）.To frequency range ^ measurement result as shown in table 5 ,/P/ results are as shown in table 6.
The H-BS of table 5!B-RSSI measurement results
Frequency range ^ B2 B3 54
B-RSSIu(dB ) -82 -79 -83 -91
B-RSSId(dBm) -83 -80 -84 -91
IB-RSSI(d m) -82.6 -79.6 -83.6 -91
Here, if UPR and DPR are represented by w standing grain tl respectively：
w =G H-'), (, Α is small
Constraints is：W+=l, and 0<W<1,0<d<i.If w=0.4, d=0.6, then the ZSJ of a frequency rangeSS/ can be expressed as：
Mono- RSSI of IB=Hn2 log (w log 2lin (B-RSSI)+d-log 2lin (B _ RSSId ))。
The H-BS of table 6] IPI
Frequency range set B2&B3
IPI (dBm)-77.8-78.1-82.9 is set according to H-BS!The ice of service feature threshold value Th mono- that the UT of current service minimum performance requirement is determined are -82dBm, IPI results are compared with the service of Th mono-, H-BS!Selection3And B4As new channel, carrier frequency is adjusted, and by system broadcasts, notifies H-BS, the band information of the UT renewals of service and the time of renewal.The free time of ^ frequency ranges is probably to shut down due to taking the H-BS of the frequency range before or enter resting state.Adjust result as shown in figure 11.If can not find/P/ meets the frequency ranges of Th-service requirements, H-BSi needs to retract the frequency range that one section of stipulated time carries out detecting whether again having the condition that meets.Retreating more than after stipulated number, H-BS will point out to work, into holding state.
Assuming that 1-：832It (is probably H-BS to start carrier frequency selection after H-BSi2Measurement and the update cycle arrive ratio H-BS2In evening, it is also possible to which H-BS, the random back-off time of selection is longer, this depends on H-BS2The carrier frequency selection trigger mechanism of use）, and in H-BS, abandon and ￡2Afterwards, related frequency range is taken without others H-BS, if for H- BS2For, UPR=0.3, DPR=0, if H-BS2To frequency resource groups ^ ..., as shown in table 7 ,/P/ results are as shown in table 8 for A measurement result.
The U-BS of table 72B-RSSI measurement result
Frequency range B2 B3 B4 B-RSSIu(d ) -92 -84 -80 -83
B-RSSIiidBm) -91 -83 -79 -83
The H-BS of-83 table of 91.3-83.3 '-79.3 of IB-RSSI (d m) 82IPI
Frequency range set B 8B2 B2&B3 Ϊ53&34
IPI (dBm) -82.7 -77.8 -77.8
According to result, Bi and B2JPI be less than Th-service, H-BS2Selection and ＆ adjust carrier frequency as new channel, and cross system broadcasts, notify H-BS2The UT of service, the band information of renewal and the time of renewal.Adjust result as shown in figure 12.If/frequency ranges of the Λ Γ less than Th mono- That ice, H-BS can not be found2Need the frequency range that one section of stipulated time of rollback carries out detecting whether to have the condition that meets again.After retrogressing exceedes stipulated number, H-BS2Point out to work, into holding state.
It can be seen that, pass through self-optimizing, H- BS^B H-BS2Realize avoiding of disturbing each other.
It should be noted that in the present embodiment, what is provided is the situation of frequency resource continuous dispensing, that is, the frequency range for constituting frequency range set is physically continuous.In the case of for the discrete distribution of frequency resource, that is, the frequency range for constituting frequency range set is only logically continuous, without physically continuously, method proposed by the present invention is equally applicable.Abnormality processing
In some cases, it is possible that H-BS can not temporarily find enough available frequency bands when carrying out self-configuring or self-optimizing in frequency resource collection（/ P/ can not meet the requirement of defined threshold）, here it is so-called abnormal conditions.When there are abnormal conditions, H-BS needs to wait one section of a period of time T longer relative to backoff time during self-configuring and self-optimizing2, then reattempt to completion self-configuring or self-optimizing.
For the abnormal conditions during self-configuring, we are still with H-BS2Exemplified by, it is assumed that basic system configuration is constant.In H-BS2Carry out during self-configuring, the measurement result of first time is as shown in Table 9 and Table 10.
' the H-BS of table 92B-RSSI measurement results
Frequency range B B2 B3 B4
B-RSSIu(dBm) -84 -82 -91 -83
B-RSSId(dBm) -83 -81 -91 -82
The H-BS of-83.2-81.2-91-82,2 tables of IB-RSSI (d m) 102//
Frequency range set Bi＆B2 B2&B3 B3 & B4
Frequency range set of/corpse/(dBm)-79.1-80.8-81.7 due to meeting Thjnti d requirements in the absence of IPI, H-BS2Need to retreat after a period of time 7, then re-start measurement, after retreating more than stipulated number, H-BS2Need to enter standby mode, wait one section of longer time 7^2After restart self-configuring process.
For self-optimizing abnormality processing, with H-BS, exemplified by, it is assumed that in 11-881Implement before self-optimizing, H-BS2
Available frequency band is found during self-configuring, is started working, frequency resource groups occupancy situation is as shown in Fig. 9.If H-BS, measurement result as shown in table 11 and table 12.
The B-RSSI measurement results of table 11
Frequency range Bi B2 B3 B
B-RSSIu(dBm) -82 -79 -83 -81
B-RSSId(dBm) -83 -80 -84 -83
The H-BS of-82.6-79.6-83.6-82.1 tables of IB-RSSI (d) 12!/
Frequency range set B, 8 B2 B2&B3 B3 & B4
IPI (dBm)-77.8-78.1-79.8 now may frequency range B4It is not released as in previously mentioned example, therefore, 11-881Available frequency band, H-BS can not also be found, it is necessary to after a period of time that worked in currently used frequency range, then re-start measurement and compare, retry more than after stipulated number, it is necessary into standby mode, wait one section of longer time Γ2After restart self-optimizing process.
Above description is only used for realizing embodiments of the present invention; it should be appreciated by those skilled in the art; the any modification or partial replacement of the scope of the present invention is not being departed from; the scope that the claim of the present invention is limited should be belonged to; therefore, protection scope of the present invention should be defined by the protection domain of claims.
Claims (1)
- ClaimA kind of carrier frequency selecting methods of TDD Home eNodeB of 1, the Uplink/Downlink available frequency resources of the TDD Home eNodeB are divided into multiple frequency ranges, and the carrier frequency selecting method comprises the following steps：Measure the received signal strength index of each frequency range in the multiple frequency range；The performance requirement coefficient of Uplink/Downlink is integrated to measurement result according to related service, to obtain the integrated interference level of each frequency range；According to the TDD Home eNodeB channel width of itself, the multiple frequency range is constituted into multiple frequency range set, wherein each frequency range set can be used for the Uplink/Downlink channel for constituting the TDD Home eNodeB；Integrated performance index based on each frequency range set of integrated interference level calculation of each frequency range in each frequency range set；The frequency range set that selection integrated performance index meets predetermined condition constitutes the Uplink/Downlink channel of the TDD Home eNodeB, so as to the carrier frequency of the Uplink/Downlink channel that adjusts the TDD Home eNodeB.2. the method as described in claim 1, wherein, the measuring process is measured including the received signal strength index for each frequency range in the multiple frequency range of uplink measurement and for the received signal strength index of each frequency range in the multiple frequency range of downlink measurement.3. method as claimed in claim 2, wherein, the measuring process includes：Complete voluntarily to complete the measurement for downlink for the survey j amounts of downlink or by the TDD Home eNodeB by user terminal, andThe measurement for up-link is voluntarily completed by the TDD Home eNodeB.4. the method for claim 1, wherein the measuring process includes：Received signal strength index to each frequency range in the multiple frequency range is taken multiple measurements, and the value repeatedly measured is averaged, and is used as the measurement result.5. the method for claim 1, whereinThe measuring process is to perform the carrier frequency choice phase when the TDD Home eNodeB is installed or restarted for the first time；AndThe integrated interference level is referred to requires coefficient according to business to the initial performance of Uplink/Downlink, and the received signal strength index measurement result to each frequency range carries out integrating the obtained comprehensive evaluation index to each band interference level.6. method as claimed in claim 5, wherein, the initial performance of Uplink/Downlink require coefficient by The Uplink/Downlink bandwidth resources demand of the business of minimum performance requirement ratio and/or Uplink/Downlink mass change shared in total bandwidth resources demand are determined for the influence degree of the QoS of survice of minimum performance requirement.7. the method for claim 1, whereinThe Ce Liang Walk are to perform the carrier frequency choice phase in the TDD Home eNodeB continuous service suddenly；AndThe integrated interference level refers to the performance requirement coefficient to Uplink/Downlink according to business, and the received signal strength index measurement result to each frequency range carries out integrating the obtained comprehensive evaluation index to each band interference level.8. method as claimed in claim 7, wherein, the Uplink/Downlink bandwidth resources demand for the business that the performance requirement coefficient of Uplink/Downlink is carried by TDD Home eNodeB ratio shared in total bandwidth resources demand and/or upper/downlink quality change are determined for the influence degree of the QoS of survice of TDD Home eNodeB carrying.9. the method for claim 1, wherein integrated performance index refers to, the interference level synthetic basis of evaluation for each frequency range set that the integrated interference level based on each frequency range in each frequency range set is obtained.10. the method for claim 1, whereinThe measuring process is to perform the carrier frequency choice phase when the TDD Home eNodeB is installed or restarted for the first time；AndThe selection step includes：It is better than the frequency range set of predetermined initial start threshold value if there is integrated performance index, then selects the optimal frequency range set of integrated performance index to constitute the Uplink/Downlink channel of the TDD Home eNodeB.11. method as claimed in claim 10, wherein, it is better than the frequency range set of predetermined initial start threshold value if there is no integrated performance index, then etc. after scheduled backoff period, then re-executes the carrier frequency choice phase.12. method as claimed in claim 11, wherein, it is described wait more than pre-determined number in the case of, the carrier frequency choice phase is re-executed after scheduled period is waited, and the predetermined period is more than the predetermined backoff period.13. the method for claim 1, whereinThe Ce Liang Walk are to perform the carrier frequency choice phase in the TDD Home eNodeB continuous service suddenly；And The selection step includes：It is better than the frequency range set of intended service performance threshold if there is integrated performance index, then selects the optimal frequency range set of integrated performance index to constitute the Uplink/Downlink channel of the TDD Home eNodeB.14. method as claimed in claim 13, in addition to-regularly start the measuring process according to the predetermined cycle；OrOccur starting the measuring process during scheduled event.15. method as claimed in claim 14, in addition to：There is scheduled event, and determining that the TDD Home eNodeB waits random time interval first, then restarts the measuring process when starting the measuring process.16. method as claimed in claim 13, wherein, it is better than the frequency range set of intended service performance threshold if there is no integrated performance index, then etc. after scheduled backoff period, then re-executes the carrier frequency choice phase.17. method as claimed in claim 16, wherein, it is described wait more than pre-determined number in the case of, the carrier frequency choice phase is re-executed after scheduled period is waited, and the predetermined period is more than described predetermined backoff period.18. the method as described in claim 13 17 is any, in addition to：After the carrier frequency of Uplink/Downlink channel of the TDD Home eNodeB is adjusted, selected frequency range set and carrier frequency adjustment information are indicated to user terminal.19. the method as described in claim 1, wherein the division of the available frequency resources is the channel width for the user terminal that the wireless access technology according to used in the TDD Home eNodeB itself can support type and divided.20. the carrier frequency adjusting apparatus of-kind of TDD Home eNodeB, the Uplink/Downlink available frequency resources of the TDD Home eNodeB are divided into multiple frequency ranges, the carrier frequency adjusting apparatus includes：Measuring unit, measures the received signal strength index of each frequency range in the multiple frequency range；Comprehensive unit, is integrated according to related service to the performance requirement coefficient of Uplink/Downlink to measurement result, to obtain the integrated interference level of each frequency range；Frequency range set designating unit, according to the TDD Home eNodeB channel width of itself, constitutes multiple frequency range set, wherein each frequency range set can be used for the Uplink/Downlink channel for constituting the TDD Home eNodeB by the multiple frequency range；Computing unit, each frequency range collection of integrated interference level calculation based on each frequency range in each frequency range set The integrated performance index of conjunction；Selecting unit, the frequency range set that selection integrated performance index meets predetermined condition constitutes the Uplink/Downlink channel of the TDD Home eNodeB, so as to the carrier frequency of the Uplink/Downlink channel that adjusts the TDD Home eNodeB.21. the carrier frequency adjusting apparatus of TDD Home eNodeB as claimed in claim 20, wherein, the measuring unit includes being used to be directed to the uplink measurement module and the downlink measurement module for the received signal strength index of each frequency range set in the multiple frequency range of downlink measurement of the received signal strength index of each frequency range in the multiple frequency range set of uplink measurement.22. the carrier frequency adjusting apparatus of TDD Home eNodeB as claimed in claim 21, wherein, the measuring unit also includes averaging module, is averaged for the value respectively to the multiple measurement of the uplink measurement module and downlink measurement module, is used as the measurement result.23. the carrier frequency adjusting apparatus of TDD Home eNodeB as claimed in claim 20, wherein, when the TDD Home eNodeB is installed or restarted for the first time, it is better than the frequency range set of predetermined initial start threshold value if there is integrated performance index, then the selecting unit selects the optimal frequency range set of integrated performance index to constitute the Uplink/Downlink channel of the TDD Home eNodeB.24. the carrier frequency adjusting apparatus of TDD Home eNodeB as claimed in claim 20, wherein-in the TDD Home eNodeB continuous service, it is better than the frequency range set of intended service performance threshold if there is integrated performance index, then the selecting unit selects the optimal frequency range set of integrated performance index to constitute the Uplink/Downlink channel of the TDD Home eNodeB.25. the carrier frequency adjusting apparatus of TDD Home eNodeB as claimed in claim 24, in addition to-start unit, for according to the predetermined cycle regularly start the measuring unit and/orStart the measuring unit when current uplink/downlink channel quality is less than predeterminated level.26. the carrier frequency adjusting apparatus of the TDD Home eNodeB as described in claim 20 25 is any, in addition to：Indicating member, frequency range from the carrier frequency adjusting module selection to user terminal and adjustment information for indicating, to allow the user terminal correspondingly to adjust channel.27. the carrier frequency adjusting apparatus of TDD Home eNodeB as claimed in claim 20, in addition to：Resource division unit, can support for the wireless access technology according to used in the TDD Home eNodeB itself channel width of the user terminal of type to realize the division of the frequency resource.
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