CN102378157A - Method for adjusting frequency bandwidth in time-division duplex mode, and user terminal and base station in time-division duplex mode - Google Patents
Method for adjusting frequency bandwidth in time-division duplex mode, and user terminal and base station in time-division duplex mode Download PDFInfo
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Abstract
The invention provides a method for adjusting frequency bandwidth in a time-division duplex mode. The method comprises the following steps that: a user terminal successfully receives an adjustment signal, adjusts the frequency bandwidth at a continuous sub-frame group having opposite type of the frequency bandwidth which is required to be adjusted, and sends a response. The method has the advantage that: by using the characteristics of time-division transmission of the user terminal in the time-division duplex mode, the adjustment time of the frequency bandwidth of the user terminal is limited, and the aim of no influence on the current data transmission is fulfilled. Moreover, the invention also provides the user terminal and a base station in the time-division duplex mode.
Description
Technical field
The present invention relates to time division duplex (TDD) communications field, more specifically, relate to the method for adjustment frequency bandwidth under a kind of TDD mode.
Background technology
In the LTE-Advanced system,, introduced CA (Carrier Aggregation, carrier aggregation) technology in order to support higher peak rate.The peak rate of LTE-A (LTE-Advanced) is greatly improved than LTE, requires to reach descending 1Gbps, up 500Mbps.Simultaneously, LTE-A system requirements and LTE system are compatible well, the maximum bandwidth 20MHz of LTE system.Based on improve peak rate, with the LTE system compatible with make full use of the needs of frequency resource, the LTE-A system has introduced carrier aggregation technology.Carrier aggregation technology is meant that up-downgoing respectively comprises a plurality of CC (Component Carrier, member carrier) in a sub-district, rather than has only the pattern of a cover carrier wave in LTE and the wireless communication system before.ENB (base station) is to many cover CC unified managements and scheduling in the sub-district.CC can be continuously perhaps discrete, and for compatible with LTE, the maximum bandwidth of each CC is 20MHz.
In CA, introduced simultaneously activation deexcitation mechanism.Be after UE (user terminal) has disposed work CC set promptly, because the variation or the channel variation of the data volume between professional transmission period possibly only need to use several work carrier waves to be used for transfer of data and get final product with scheduling at ENB.In this case, the process that ENB can be through deexcitation is the deexcitation of the unwanted work carrier wave of part, portion C C deexcitation can be let UE power saving more, extending battery life.When the required data quantity transmitted of UE increases, i.e. the CC of desired data transmission increases, and then can portion C C be activated through the mode of signaling control.
Because 1 RF (frequency) may be used for handling the data of a plurality of carrier waves in the design of CA UE.When changing, economize electrical degree from UE and consider that UE need readjust bandwidth and the center frequency point position of this RF with the activation CC number on 1 RF.But because other transfer of data that activated on the CC that the adjustment of RF center frequency point can make identical RF upward work can't normal process.Be can not the normal process data on this RF in the RF adjustment process, accomplish up to the RF adjustment.
Fig. 1 is the sketch map that traditional RF adjustment process is shown.As shown in Figure 1:
As UE configuration CC1 and CC2, wherein CC1 and CC2 use same RF;
When UE is operated under the CC1, ENB sends activation command in subframe 1 and gives UE;
After ENB receives the corresponding ACK (acknowledge character) of this MAC CE, think that activation command UE successfully obtains;
UE spends the Xms time, successfully decode this MAC CE and know the order that activates CC2 of MAC layer;
The UE cost Yms time is used to adjust RF then;
If Yms in the time ENB on CC1, continue scheduling UE, so corresponding grant and data all can be dropped; If ENB does not dispatch UE, then can cause the short interruption of transfer of data.Be that the RF adjustment can have influence on current transfer of data.
In activation, the fault (glitch) that RF adjustment (retune) causes comprises two kinds of situation: when UE receives that MAC CE signaling request activates the CC in the same RF of deexcitation, and adjustment RF adjustment; The moment that on deexcitation CC, need measure.
In addition, also introduced the local oscillator design of TDD UE.Local oscillator is used to control the RF transmission of UE and the frequency that receives.The TDD sub-district of R8/9 comprises 1 frequency, and the up-downgoing of TDD transmission is time-multiplexed, and up-downgoing (send and receive) works in same frequency, so R8/9TDD UE only needs 1 local oscillator to get final product.But for the TDD UE that supports the CA technology; Because the support of up-downgoing asymmetric capability, i.e. the difference of the upstream and downstream bandwidth of UE work makes the work centre frequency of up-downgoing also different; There is the possibility of two kinds of local oscillator designs in CA TDD UE; That is: TDD UE uses 1 local oscillator, and bandwidth of operation is provided with according to UL/DL transmission bandwidth the maximum, and this local oscillator works in the center frequency point of maximum bandwidth; TDD UE uses 2 local oscillators, controls the bandwidth and the center frequency point of uplink and downlink respectively.
In the time of activation or deexcitation carrier wave; Consider from the angle of UE power saving; UE can adjust the center frequency point position of RF (frequency) and the amount of bandwidth of RF; But the process at adjustment RF can have influence on the transfer of data of other carrier waves of working on the same RF, causes that data packet transmission loses or transmit interruption.That is to say, need be when activating deexcitation CC and carry out the RF adjustment for CA UE, or CA UE will measure on deexcitation CC and carry out in the RF adjustment, in the stage of RF adjustment, can have influence on this RF and go up the transfer of data on all activated CC.
Summary of the invention
In order to address the above problem, the present invention has provided a kind of RF method of adjustment that does not influence transfer of data to TDD UE.The present invention has utilized the time division multiplexing characteristics of TDD technology, has solved TDDCA UE and in the process of adjustment RF, can have influence on the problem that current data is transmitted.
The present invention mainly solves in the CA technology, and how TDD UE adjusts a kind of method that the RF adjustment does not influence the current data transmission, and how the base station knows that UE accomplishes the method for RF adjustment information.
According to an aspect of the present invention, the method for adjustment frequency bandwidth under a kind of TDD mode is provided, may further comprise the steps: user terminal successfully receives the adjustment signal; And, frequency bandwidth is adjusted, and sent response to the base station at the continuous subframes group place that has with the frequency bandwidth opposite types time slot direction of required adjustment.
In the method; The continuous subframes group is first continuous subframes group that meets the following conditions: the number of sub frames between at least one subframe when receiving the adjustment signal in residing subframe and the continuous subframes group is more than or equal to the predetermined subframe number; Wherein, the predetermined subframe number is that user terminal receives signal and handles required number of sub frames.
In the method, at least one subframe in subframe and the continuous subframes group confirms through the frame structure parameter, wherein, the frame structure parameter be with subframe and continuous subframes group in the corresponding configuration sequence number of at least one subframe.
In the method, frequency bandwidth comprises two types of upstream frequency bandwidth and downstream frequency bandwidths.Wherein, upstream frequency bandwidth and downstream frequency bandwidth are respectively by two local oscillator controls.Wherein, up guide time slot is as sub-frame of uplink, and downward guide time slot is as descending sub frame.The adjustment signal comprises activation signal and deexcitation signal.
In the method, comprise that also user terminal sends failure response when user terminal receives the adjustment Signal Fail, and receive the adjustment signal again; And repeat above operation, receive the adjustment signal until user terminal.
In the method, also comprise: when the adjustment signal was activation signal, user terminal was rescheduled; And when the adjustment signal was the deexcitation signal, user terminal received that after the deexcitation signal, the scheduling of said user terminal stops.
According to a further aspect in the invention, the user terminal under a kind of TDD mode is provided also, has comprised: receiving element successfully receives the adjustment signal; Adjustment unit, the continuous subframes group place having with the frequency bandwidth opposite types of required adjustment adjusts frequency bandwidth; And transmitting element, response is sent in the adjustment back.
In this user terminal, the continuous subframes group is first continuous subframes group that meets the following conditions: the number of sub frames between at least one subframe when receiving the adjustment signal in residing subframe and the continuous subframes group receives signal and handles required number of sub frames more than or equal to user terminal.
In this user terminal, frequency bandwidth comprises two types of upstream frequency bandwidth and downstream frequency bandwidths.Wherein, upstream frequency bandwidth and downstream frequency bandwidth are respectively by two local oscillator controls.Wherein, up guide time slot is as sub-frame of uplink, and downward guide time slot is as descending sub frame.The adjustment signal comprises activation signal and deexcitation signal.
According to another aspect of the invention, the base station under a kind of TDD mode is provided, has comprised: transmitting element is used to send activation signal or deexcitation signal; Scheduling unit is used for when sending activation signal, has after continuous subframes group place with the frequency bandwidth opposite types of required adjustment adjusts frequency bandwidth at user terminal, receives the response of returning, and dispatched users terminal again; And stop scheduling unit, be used for stopping the dispatched users terminal when when user terminal sends the deexcitation signal.
In this base station, the continuous subframes group is first continuous subframes group that meets the following conditions: the number of sub frames between at least one subframe when receiving the adjustment signal in residing subframe and the continuous subframes group receives signal and handles required number of sub frames more than or equal to user terminal.
In this base station, frequency bandwidth comprises two types of upstream frequency bandwidth and downstream frequency bandwidths.Wherein, upstream frequency bandwidth and downstream frequency bandwidth are respectively by two local oscillator controls.Wherein, up guide time slot is as subframe, and downward guide time slot is as subframe.
This method has been utilized the characteristics of the time-division transmission of TDD UE, the time of restriction UE adjustment RF, reaches the purpose that does not influence the current data transmission.
Further; TDD CA UE is line activating deexcitation order adjustment RF under basis; Perhaps on deexcitation CC, measure in the adjustment RF, be chosen in the adjustment that sub-frame of uplink carries out descending RF bandwidth, if up introducing activates deactivation status; Then UE can carry out the adjustment of up RF bandwidth at descending sub frame, does not influence the transmission of current data.
In addition; The base station sends out to activate and promptly stops at this CC after the CC order and go up scheduling UE, when the base station is confirmed to activate CC, promptly receiving activate the corresponding ACK of signaling after, or according to activating timing relationship; Beginning is dispatched UE on the new CC that activates, the influence that the base station behavior is not measured by UE deexcitation carrier wave.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the sketch map that traditional RF adjustment process is shown.
Fig. 2 illustrates the flow chart of adjusting the method for frequency bandwidth according to TDD mode of the present invention down.
Fig. 3 shows the form of tdd frame structure.
Fig. 4 is the block diagram that illustrates according to the user terminal under the TDD mode of the embodiment of the invention.
Fig. 5 is the block diagram that illustrates according to the base station under the TDD mode of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Fig. 2 illustrates the flow chart of adjusting the method for frequency bandwidth according to TDD mode of the present invention down.
In step 202, user terminal successfully receives the adjustment signal;
In step 204, the continuous subframes group place having with the frequency bandwidth opposite types time slot direction of required adjustment adjusts said frequency bandwidth, and sends response.Wherein, The continuous subframes group is first continuous subframes group that meets the following conditions: the number of sub frames between at least one subframe when receiving the adjustment signal in residing subframe and the continuous subframes group is more than or equal to the predetermined subframe number, and this predetermined subframe number is that user terminal receives signal and handles required number of sub frames.Frequency bandwidth comprises two types of upstream frequency bandwidth and downstream frequency bandwidths.
Particularly, in this process, after UE received descending activation command, first descending sub frame of striding after one or two continuous sub-frame of uplink group came into force.After UE received up activation command, first sub-frame of uplink of striding after one or two continuous descending sub frame group came into force.Stride one still two sub-frame groups depend on the alternate position spike K of each sub-frame in the subframe of eating dishes without rice or wine to receive activation command and sub-frame of uplink group (for descending line activating) or the descending sub frame group (for last line activating).As long as, then cross over 1 continuous subframes group and come into force if in this subframe group 1 sub-frame is arranged and eat dishes without rice or wine to receive of the requirement of the subframe position difference of activation command more than or equal to K; Otherwise crossing over two continuous subframes groups comes into force.The K value depends on that UE to receiving the processing speed of MAC CE, is generally 3 or 4.
Below, will carry out foregoing through the specific embodiment that utilizes the tdd frame structure and further describe.Fig. 3 shows the form of tdd frame structure.Those of ordinary skills can find after reading specification; In certain embodiments; With up guide time slot (UpPTS) and downward guide time slot (DwPTS) respectively as sub-frame of uplink and descending sub frame; And in further embodiments, up guide time slot (UpPTS) and downward guide time slot (DwPTS) be not as sub-frame of uplink or descending sub frame.In addition, those of ordinary skills can also learn that the RF bandwidth is identical with the effect that center frequency point is played in an embodiment.
Suppose that TDD UE configurating downlink CC set is 2, i.e. CC1 and CC2, and CC1 belongs to same 1 RF with CC2.
In this embodiment, UE has two local oscillators to control uplink and downlink bandwidth respectively.
Current descending CC1 activates, and ENB sends MAC CE and activates descending CC2;
UE adjusts descending RF bandwidth simultaneously in the subframe of feeding back ACK, and the adjustment time in this step, also can be adjusted center frequency point at 1ms;
After ENB parses ACK, think that UE adjustment RF accomplishes, beginning scheduling UE on new CC1 and CC2 receives data.
In this embodiment, UE has two local oscillators to control uplink and downlink bandwidth respectively.Current use TDD configuration 1 supposes that the K value is 4.
Current descending CC1 activates, and ENB sends MAC CE and activates descending CC2, and the order delivery time is a subframe 0;
After UE solved and activates up CC2 order, this moment, corresponding nearest up continuous subframes group was a subframe 2,3, because distance is less than the K value, so the time point of UE adjustment RF is that next up continuous subframes group is a subframe 7,8.The RF adjustment that is UE is accomplished, and promptly new CC activation moments is a subframe 9.
UE gives ENB at subframe 7 feeding back ACKs;
After ENB parses ACK, or, promptly can begin scheduling UE reception data on new CC1 and CC2 from subframe 9 beginnings.
In this embodiment, UE has two local oscillators to control uplink and downlink bandwidth respectively.Current use TDD configuration 4 supposes that the K value is 4.
Current descending CC1 activates, and ENB sends MAC CE and activates descending CC2, and the order delivery time is a subframe 5;
After UE solved and activates up CC2 order, this moment, corresponding nearest up continuous subframes group was a subframe 2,3, because distance is greater than the K value, so the time point of UE adjustment RF is a subframe 2,3 for this up continuous subframes group.The RF adjustment that is UE is accomplished, and promptly new CC activation moments is a subframe 4.
UE gives ENB at subframe 2 feeding back ACKs;
After ENB parses ACK, or, promptly can begin scheduling UE reception data on new CC1 and CC2 from subframe 4 beginnings.
In this embodiment, UE has two local oscillators to control uplink and downlink bandwidth respectively.
Current descending CC1 and CC2 activate, but ENB wants the descending CC2 of deexcitation;
ENB promptly begins to stop at CC2 and goes up the transfer of data to UE when sending deexcitation CC2 order;
UE replys the ACK signaling and gives network side after solving the descending CC2 order of deexcitation;
UE adjusts descending RF bandwidth or center frequency point at nearest sub-frame of uplink.
In this embodiment, UE has two local oscillators to control uplink and downlink bandwidth respectively.Current use TDD configuration 1 supposes that the K value is 4.
Current up CC1 activates, but up CC2 deexcitation, ENB sends MAC CE and activates up CC2, and the order delivery time is a subframe 0;
After UE solved and activates up CC2 order, this moment, corresponding nearest descending continuous subframes group was a subframe 0, and DwPTS is because distance is less than the K value, so the time point of UE adjustment RF is that next descending continuous subframes group is a subframe 4,5.The RF adjustment that is UE is accomplished, and promptly new CC activation moments is the UpPTS of subframe 6.
UE gives ENB at subframe 7 feeding back ACKs;
After ENB parses ACK, or, promptly can begin scheduling UE transmission data on new CC1 and CC2 from subframe 6 beginnings.
In this embodiment, UE has two local oscillators to control uplink and downlink bandwidth respectively.Current use TDD configuration 4 supposes that the K value is 4.
Current up CC1 activates, and ENB sends MAC CE and activates up CC2, and the order delivery time is a subframe 5;
After UE solves and activates up CC2 order; This moment, corresponding nearest descending continuous subframes group was subframe 6/7/8/9/0/DwPTS, because subframe 0 distance is more than or equal to the K value, so the time point of UE adjustment RF can be the subframe 9 in this descending continuous subframes group; 0, DwPTS.The RF adjustment that is UE is accomplished, and promptly new CC activation moments is a subframe 2.
UE gives ENB at subframe 2 feeding back ACKs;
After ENB parses ACK, or, promptly can begin scheduling UE transmission data on new CC1 and CC2 from subframe 2 beginnings.
In this embodiment, UE has two local oscillators to control uplink and downlink bandwidth respectively.
Current UE only is operated on the CC1, the CC2 deexcitation, and the RF center frequency point is at the center of CC1;
When UE need measure on CC2; Then UE selects 1 UL subframe in advance to adjust the position of RF bandwidth to CC1+CC2; Begin to carry out the measurement on the CC2 then, when measurement finishes the center that the RF center frequency point is readjusted back CC1 in the position of a UL subframe after then UE is chosen in.In this process, ENB is not influenced.
In this embodiment, UE has two local oscillators to control uplink and downlink bandwidth respectively.
Current C C1 activates, and ENB sends MAC CE and activates CC2;
UE takes defeat, feedback NACK;
ENB transmits the MAC CE of this activation CC2 again;
UE receives successfully, activates CC2, feeding back ACK;
After ENB parses ACK, or according to activating timing relationship, think that UE adjustment RF accomplishes, beginning scheduling UE on new CC sends data.
In this embodiment, UE has 1 local oscillator to control uplink and downlink bandwidth simultaneously.
All disposed CC1 and CC2 when the ENB up-downgoing, then UE local oscillator bandwidth is set to CC1+CC2;
After ENB had sent activation deexcitation CC2 order, UE did not do the RF adjustment, but still needed to reply ACK;
After ENB receives the corresponding ACK feedback of activation command, then think and on the new CC of activation, to dispatch UE.
Through reading above content, those of ordinary skills can learn that the time point sequencing of the time point of UE feeding back ACK and UE adjustment RF bandwidth can change.
Fig. 4 is the block diagram that illustrates according to the user terminal under the TDD mode of the embodiment of the invention.
Can know through a plurality of embodiment recited above, comprise according to the user terminal under the TDD mode of the embodiment of the invention 400: receiving element 402 receives the adjustment signal from the base station; Adjustment unit 404, the continuous subframes group place having with the frequency bandwidth opposite types of required adjustment adjusts frequency bandwidth; And transmitting element 406, response is sent to the base station in the adjustment back.
In this user terminal 400, frequency bandwidth comprises two types of upstream frequency bandwidth and downstream frequency bandwidths.Wherein, upstream frequency bandwidth and downstream frequency bandwidth are respectively by two local oscillator controls.
For user terminal 400, after user terminal was received descending activation command, first descending sub frame of striding after one or two continuous sub-frame of uplink group came into force.After user terminal was received up activation command, first sub-frame of uplink of striding after one or two continuous descending sub frame group came into force.
Fig. 5 is the block diagram that illustrates according to the base station under the TDD mode of the embodiment of the invention.
Can know through a plurality of embodiment recited above, comprise according to the base station under the TDD mode of the embodiment of the invention 500: transmitting element 502 is used for sending activation signal or deexcitation signal to user terminal; Scheduling unit 504; Be used for when when user terminal sends activation signal; Have after continuous subframes group place with the frequency bandwidth opposite types of required adjustment adjusts frequency bandwidth at user terminal, receiving the response that send the base station, and dispatched users terminal again; And stop scheduling unit 506, be used for stopping the dispatched users terminal when when user terminal sends the deexcitation signal.
For this base station 500, after activation deexcitation order was sent in base station 500, base station 500 need not to stop current activation CC and goes up the scheduling to this user terminal.After the deexcitation command information is sent in base station 500, stop at the data dispatch on the deexcitation CC immediately.After base station 500 obtains deexcitation order corresponding response information, or postpone time predefined section (promptly activating timing relationship according to predefined user terminal), beginning scheduling user terminal on new activation CC carries out transfer of data.Thereby, the scheduling of the 500 pairs of user terminals in base station, the influence that not on deexcitation CC, measured by user terminal.
In addition, for single local oscillator TDD UE, RF bandwidth and center frequency point are not adjusted, and work in maximum bandwidth.For two local oscillator TDD UE, descending RF is adjusted at the up moment to carry out, and up RF is adjusted at the descending moment to carry out.In whole activation deactivation process, the RF of UE remains on the fixed-bandwidth, does not adjust according to the carrier wave number that activates deexcitation, and TDD UE transfer of data can not lost.
In above-mentioned discussion, consider that from the angle of FDD the RF adjustment that the measurement on activation carrier wave and the deexcitation carrier wave causes can have influence on and activate the situation that CC goes up transfer of data.And the present invention proposes a kind of method that is suitable for multi-carrier-wave TDD UE adjustment RF and does not influence the current data transmission, make that the TDD performance is better than FDD on this aspect.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (22)
1. the TDD mode method of adjustment frequency bandwidth down may further comprise the steps:
User terminal successfully receives the adjustment signal; And
Continuous subframes group place having with the frequency bandwidth opposite types time slot direction of required adjustment adjusts said frequency bandwidth, and sends response.
2. method according to claim 1 is characterized in that, said continuous subframes group is first continuous subframes group that meets the following conditions:
Number of sub frames between at least one subframe when receiving said adjustment signal in residing subframe and the continuous subframes group is more than or equal to the predetermined subframe number.
3. method according to claim 2 is characterized in that, said predetermined subframe number is that said user terminal receives signal and handles required minimum number of sub frames.
4. method according to claim 3 is characterized in that, at least one subframe in said subframe and the said continuous subframes group is confirmed through the frame structure parameter.
5. method according to claim 4 is characterized in that, said frame structure parameter be with said subframe and said continuous subframes group in the corresponding configuration sequence number of at least one subframe.
6. require each described method according to aforesaid right, it is characterized in that, said frequency bandwidth comprises two types of upstream frequency bandwidth and downstream frequency bandwidths.
7. according to each described method in the claim 1 to 5, it is characterized in that said adjustment signal comprises activation signal and deexcitation signal.
8. method according to claim 6 is characterized in that, said upstream frequency bandwidth and said downstream frequency bandwidth are respectively by two local oscillator controls.
9. method according to claim 6 is characterized in that up guide time slot is as sub-frame of uplink, and downward guide time slot is as descending sub frame.
10. according to each described method in the claim 1 to 5, also comprise:
When said user terminal received said adjustment Signal Fail, said user terminal sent failure response, and receives said adjustment signal again; And
Repeat above operation, receive said adjustment signal until user terminal.
11. method according to claim 7 also comprises: when said adjustment signal was said activation signal, said user terminal was rescheduled; And
When said adjustment signal was said deexcitation signal, user terminal received that after the deexcitation signal, the scheduling of said user terminal stops.
12. the user terminal under the TDD mode comprises:
Receiving element successfully receives the adjustment signal;
Adjustment unit, the continuous subframes group place having with the frequency bandwidth opposite types of required adjustment adjusts said frequency bandwidth; And
Transmitting element, response is sent in the adjustment back.
13. user terminal according to claim 12 is characterized in that, said continuous subframes group is first continuous subframes group that meets the following conditions:
Number of sub frames between at least one subframe when receiving said adjustment signal in residing subframe and the continuous subframes group receives signal and handles required number of sub frames more than or equal to user terminal.
14., it is characterized in that said frequency bandwidth comprises two types of upstream frequency bandwidth and downstream frequency bandwidths according to claim 12 or 13 described user terminals.
15., it is characterized in that said adjustment signal comprises activation signal and deexcitation signal according to claim 12 or 13 described user terminals.
16. user terminal according to claim 14 is characterized in that, said upstream frequency bandwidth and said downstream frequency bandwidth are respectively by two local oscillator controls.
17. user terminal according to claim 14 is characterized in that, up guide time slot is as sub-frame of uplink, and downward guide time slot is as descending sub frame.
18. the base station under the TDD mode comprises:
Transmitting element is used to send activation signal or deexcitation signal;
Scheduling unit is used for when sending activation signal, has after continuous subframes group place with the frequency bandwidth opposite types of required adjustment adjusts said frequency bandwidth at said user terminal, receive the response of returning, and dispatching office is stated user terminal again; And
Stop scheduling unit, be used for stopping to dispatch said user terminal when when user terminal sends the deexcitation signal.
19. base station according to claim 18 is characterized in that, said continuous subframes group is first continuous subframes group that meets the following conditions:
Number of sub frames between at least one subframe when receiving said adjustment signal in residing subframe and the continuous subframes group receives signal and handles required number of sub frames more than or equal to user terminal.
20., it is characterized in that said frequency bandwidth comprises two types of upstream frequency bandwidth and downstream frequency bandwidths according to claim 18 or 19 described base stations.
21. base station according to claim 20 is characterized in that, said upstream frequency bandwidth and said downstream frequency bandwidth are respectively by two local oscillator controls.
22. base station according to claim 20 is characterized in that, up guide time slot is as subframe, and downward guide time slot is as subframe.
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Application publication date: 20120314 |