CN103430468B - The dynamic subframe method to set up of wireless communication system and device thereof - Google Patents

The dynamic subframe method to set up of wireless communication system and device thereof Download PDF

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Publication number
CN103430468B
CN103430468B CN201280012880.3A CN201280012880A CN103430468B CN 103430468 B CN103430468 B CN 103430468B CN 201280012880 A CN201280012880 A CN 201280012880A CN 103430468 B CN103430468 B CN 103430468B
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Prior art keywords
subframe
signal
subscriber equipment
base station
time slot
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CN103430468A (en
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李承旻
徐翰瞥
金学成
崔英燮
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LG Electronics Inc
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LG Electronics Inc
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Priority claimed from PCT/IB2012/000653 external-priority patent/WO2013008065A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]

Abstract

The present invention discloses and a kind ofly signal is transmitted into base station/from the method for base station received signal for terminal in a wireless communication system.Particularly, if the method comprise wherein from the first subframe transmission of uplink signal and from the first step of the second subframe receiving downlink signal and wherein the first subframe changed the reception making to be used to down link signal, from the second step of the first subframe and the second subframe receiving downlink signal; And the method is characterized in that guard space is between the first and second subframes in a first step, guard space is located at the front end place of the first subframe in the second step, and the first and second subframes are continuous print.

Description

The dynamic subframe method to set up of wireless communication system and device thereof
Technical field
The present invention relates to a kind of wireless communication system, and more specifically, relate to a kind of method and apparatus for dynamically configuring subframe in a wireless communication system.
Background technology
The concise and to the point description of third generation partner program (3GPP) Long Term Evolution (3GPPLTE) system that can be applied to the example of its wireless communication system as the present invention will be provided.
Fig. 1 diagram is as the configuration of the network of the evolved universal mobile communication system (E-UMTS) of the example of wireless communication system.E-UMTS system is the evolution of the UMTS system left over, and 3GPP carries out work to the standard of E-UMTS.E-UMTS is also referred to as LTE system.For the details of the technical specification of UMTS and E-UMTS, respectively with reference to " 3rdGenerationPartnershipProject; TechnicalSpecificationGroupRadioAccessNetwork(third generation partner program; Technical specification group radio access network) " version 7 and version 8.
Comprise with reference to figure 1, E-UMTS system: subscriber equipment (UE); Enode b (e Node B and eNB); And IAD (AG), it is positioned at the end of evolution UMTS Terrestrial Radio Access Network network (E-UTRAN) and is connected to external network.ENB side by side can launch the multiple data flow for broadcast service, multicast service and/or unicast services.
Single eNB manages one or more community.Community is set to operation in 1.25,2.5,5,10 and of bandwidth of 20Mhz, and for multiple UE provides down link (DL) or up link (UL) transmission service in this bandwidth.Different communities can be configured such that provides different bandwidth.ENB controls to the transfer of data of multiple UE and the data receiver from multiple UE.About DL data, by DL schedule information is transmitted into UE, eNB notifies that particular UE wherein supposes the time that DL data are launched and frequency domain, compilation scheme, size of data, mixed automatic repeat request (HARQ) information etc.About UL data, by UL schedule information is transmitted into UE, eNB notifies specific UE, and wherein UE can the time-frequency domain, compilation scheme, size of data, HARQ information etc. of transmitting data.The interface for launching customer service or service control can be defined between eNB.Core net (CN) can comprise the AG and network node that the user for UE registers.AG manages the mobility of UE on the basis of tracking area (TA).TA comprises multiple community.
Although based on width code division multiple access (WCDMA), the development phase of wireless communication technology realizes LTE, demand and the expectation of user and service provider are growing.Consider that other radio access technologies develops, the technological evolvement that look for novelty is to realize following competitiveness.Particularly, the suitable power consumption etc. of the service availability require that the cost of every bit reduces, increasing, the flexible use of frequency band, simplified structure, opening interface, UE.
Summary of the invention
Technical problem
Be designed to the object of the invention is to provide a kind of method and apparatus for dynamically configuring the subframe in wireless communication system of solution traditional problem.
Technical solution
In in of the present invention, for signal being transmitted into base station and the method from base station received signal at subscriber equipment place in a wireless communication system, comprising: in the first subframe transmission of uplink signal and in the second subframe the first step of receiving downlink signal; And if the use of the first subframe be changed to down link signal and receive, then the second step of receiving downlink signal in the first and second sub-frames.Protective time slot is inserted between the first and second subframes in a first step, and protective time slot is positioned in the beginning of the first subframe and the first and second subframes are continuous print in the second step.
In another aspect of this invention, the subscriber equipment in wireless communication system comprises: wireless communication module, and this wireless communication module is used for signal being transmitted into base station and from base station received signal; And processor, this processor is for the treatment of signal.Be changed to down link signal receive if processor controls wireless communication module to perform in the first subframe the first step of receiving downlink signal and the use of the first subframe in transmission of uplink signal and the second subframe, the second step of receiving downlink signal in the first and second sub-frames.Protective time slot is inserted between the first and second subframes in a first step, and protective time slot is positioned in the beginning of the first subframe in the second step, and the first and second subframes are continuous print.
Protective time slot can be that transmission-reception switches the period.The length of protective time slot can be equal to, or greater than timing advance, and described timing advance is used to timing match between subscriber equipment and base station or propagation delay.
Second step may further include and receives from base station the designator indicating the use of the first subframe physical control channel to change into down link signal reception.Designator can be carrier indication field (CIF) or downlink allocation index (DAI).
Other subscriber equipment is not dispatched in base station in the first subframe in the second step.
Subscriber equipment can not perform the measurement for provided for radio resources management (RRM) in the first subframe, or can report the measurement result of the first subframe and the measurement result of the second subframe individually.
Beneficial effect
According to embodiments of the invention, dynamic subframe allocative decision can be performed efficiently in a wireless communication system.
It will be understood by those skilled in the art that the effect that the present invention can be utilized to realize is not limited to specifically described effect above, according to the detailed description below in conjunction with accompanying drawing, more clearly will understand other advantage of the present invention.
Accompanying drawing explanation
Fig. 1 diagram is as the configuration of evolved universal mobile communication system (E-UMTS) network of the example of mobile communication system;
Fig. 2 is shown in and meets chain of command protocol stack in the radio interface protocol framework of third generation partner program (3GPP) radio access network standard and user face protocol stack between subscriber equipment (UE) and evolution UMTS Terrestrial Radio Access Network network (E-UTRAN);
Fig. 3 diagram physical channel in a 3 gpp system and the general signal transmission method of this physical channel of use;
Fig. 4 is shown in the structure of the radio frame in Long Term Evolution (LTE) system;
Fig. 5 is shown in the structure of the downlink radio frame in LTE system;
Fig. 6 diagram is used to the Resource Unit configuring control channel;
Fig. 7 is shown in the example of distributed controll channel element (CCE) in system band;
Fig. 8 is shown in the structure of the uplink sub-frames in LTE system;
Fig. 9 illustrative exemplary dynamic subframe allocation plan;
Figure 10 illustrates another exemplary dynamic sub-frame configuration scheme;
Figure 11 is shown in the problem run into arranged at predetermined intervals downlink subframe and uplink sub-frames in time division duplex (TDD) system;
Figure 12 illustrates the use of the special subframe in TDD system;
Figure 13 and Figure 14 diagram is according to the example changing subframe structure when dynamically changing the use of subframe of the embodiment of the present invention; And
Figure 15 is the block diagram of the communication equipment according to the embodiment of the present invention.
Embodiment
The embodiments of the invention be described with reference to the drawings are utilized will easily to understand configuration of the present invention, operation and further feature.Embodiments of the invention as proposed at this are that wherein technical characteristic of the present invention is applied to the example of third generation partner program (3GPP) system.
Although describe embodiments of the invention in the context of Long Term Evolution (LTE) and LTE-senior (LTE-A) system, they are only exemplary.Therefore, as long as above-mentioned definition is effective for communication system, embodiments of the invention can be applicable to other communication system any.
Fig. 2 is shown in the chain of command meeting the radio interface protocol framework of 3GPP wireless access network standard between subscriber equipment (UE) and evolution UMTS Terrestrial Radio Access Network network (E-UTRAN) and user face protocol stack.Chain of command be wherein UE and E-UTRAN emission control message with the path of administer calls, and user face be wherein launch from application layer produce data, such as, the path of speech data or internet packet data.
Information transfer service is supplied to its higher level by physics (PHY) layer being in ground floor (L1) place, medium education (MAC) layer.PHY layer is connected to MAC layer via transfer channel.Transfer channel is delivering data between MAC layer and PHY layer.Transmitting data on physical channel between reflector and the PHY layer of receiver.Physical channel service time and frequency are as radio resource.Particularly, modulation physical channel in for the OFDM (OFDMA) of down link and in for the single-carrier frequency division multiple access (SC-FDMA) of up link.
Via logic channel, service is supplied to its higher level in the MAC layer at the second layer (L2) place, radio link controls (RLC) layer.In the reliable transfer of data of rlc layer support at L2 place.RLC can be realized functional in the functional block of MAC layer.PDCP (PDCP) layer at L2 place perform header-compressed with reduce unnecessary control information quantity and thus via the air interface transmission such as IP version 4(IPv4 with narrow bandwidth) or IP version 6(IPv6) Internet Protocol (IP) grouping.
Control (RRC) layer at the radio resource of the lowest portion of third layer to be only defined in the control plane.Rrc layer controls with the configuration of radio bearer (RB), reconfigures and discharge relevant logic channel, transfer channel and physical channel.RB refers to the service provided at L2 place, for the transfer of data between UE and E-UTRAN.For this purpose, the rrc layer of UE and UTRAN intercourses RRC information.If set up RRC to connect between UE and E-UTRAN, then under UE is in RRC connection mode, and otherwise, under UE is in RRC idle pulley.Non-Access Stratum (NAS) on rrc layer performs the function comprising session management and mobile management.
The community covered by eNB be set to 1.25,2.5,5,10,15 and 20Mhz bandwidth in one, and in this bandwidth, provide down link or uplink transmission services for multiple UE.Different communities can be set to provide different bandwidth.
Be used to the downlink transmission channel of the data delivery to UE that come from E-UTRAN be comprised the broadcast channel (BCH) of carrying system information, carry the paging channel (PCH) of beep-page message, and carry the shared channel (SCH) of customer service or control message.Can on down link SCH or by the upper transmitting down link multicast service of the downlink Multicast Channel (MCH) that defines individually or control message or downlink broadcast traffic or control message.The data delivery coming from UE is used to comprise the Random Access Channel (RACH) of carrying initial control message and the up link SCH carrying customer service or control message to the uplink transfer channel of E-UTRAN.Face definition and the logic channel being mapped to transfer channel comprises Broadcast Control Channel (BCCH), Paging Control Channel (PCCH), Common Control Channel (CCCH), multicast control channel (MCCH) and Logical Traffic Channels (MTCH) etc. on a transmission channel.
Fig. 3 diagram physical channel in a 3 gpp system and the conventional method for transmitting on the physical channel.
With reference to figure 3, when UE is energized or enters new community, UE performs search of initial zone (S301).Search of initial zone relates to the synchronous collection to eNB.Particularly, UE synchronous its to the timing of eNB and by receiving primary synchronization channel (P-SCH) from eNB and auxiliary synchronization channel (S-SCH) obtains cell identifier (ID) and out of Memory.Then UE can by obtaining the information broadcasting community from eNB reception Physical Broadcast Channel (PBCH).During search of initial zone, UE can monitor downlink channel status by receiving downlink reference signal (DLRS).
After search of initial zone, UE can pass through based on the receives information physical downlink control channel (PDCCH) comprised at PDCCH and receive physical down link sharing channel (PDSCH) to obtain detailed system information (S302).
If UE accesses eNB at first or do not have the radio resource for the Signal transmissions to eNB, then UE can perform the random access procedure (S303 to S306) with eNB.In the random access procedure, UE can on Physical Random Access Channel (PRACH) using predetermined sequence as leading transmitting (S303 and S305), and can to receive leading response message (S304 and S306) on PDCCH and the PDSCH be associated with PDCCH.When the RACH based on competition, UE can additionally perform contention resolved process.
After said process, UE can receive PDCCH and/or PDSCH(S307 from eNB) and physical uplink link shared channels (PUSCH) and/or physical uplink control channel (PUCCH) are transmitted into eNB(S308), it is general down link and uplink signal transmission process.Particularly, UE receiving downlink control information on PDCCH.At this, DCI comprises such as the control information of the resource allocation information of UE.According to the DCI format that the difference of DCI uses definition different.
UE is transmitted into eNB on uplink or comprises uplink/downlink acknowledgement/non-acknowledgement (ACK/NACK) signal, CQI (CQI), pre-coding matrix index (PMI), order designator (RI) etc. from the control information that eNB receives.In 3GPPLTE system, UE can launch the control information of such as CQI, PMI, RI etc. on PUSCH and/or PUCCH.
Fig. 4 is shown in the structure of the radio frame used in LTE system.
With reference to figure 4, radio frame is 10ms(327200xT s) long and be divided into the subframe of 10 equivalent sizes.Each subframe is 1ms length and is divided into two time slots further.Each time slot is 0.5ms (15360xT s) long.At this, T srepresent the sampling time and T s=1/ (15kHzx2048)=3.2552x10 -8(about 33ns).Time slot comprises the multiple Resource Block (RB) in multiple OFDM symbol in time domain or SC-FDMA symbol and frequency domain.In LTE system, a RB comprises 12 subcarriers and is multiplied by 7(or 6) individual OFDM symbol.Wherein the unit interval of transmitting data is defined as Transmission Time Interval (TTI).TTI can be defined as one or more subframes.Above-mentioned radio frame structure is only exemplary and number in OFDM symbol in the number of time slot in the number of subframe therefore in radio frame, subframe or time slot can change.
Fig. 5 diagram is included in the exemplary control channel in the control area of the subframe in downlink radio frame.
With reference to figure 5, subframe comprises 14 OFDM symbol.Control area is used to and other 13 to 11 OFDM symbol are used to data area according to before sub-frame configuration subframe or three OFDM symbol.In Figure 5, reference character R1 to R4 represents RS for antenna 0 to antenna 3 or pilot signal.RS is distributed in a predetermined pattern, no matter control area and data area in subframe.In control area, control channel is assigned to non-RS resource and Traffic Channel is also assigned to non-RS resource in the data area.The control channel being assigned to control area comprises physical control format indicator channel (PCFICH), physical mixed-ARQ indicator channel (PHICH), physical downlink control channel (PDCCH) etc.
PCFICH is the physical control format indicator channel of the information of the number carried in each subframe about the OFDM symbol being used to PDCCH.PCFICH is arranged in the first OFDM symbol of subframe, and is configured with priority on PHICH and PDCCH.PCFICH is made up of 4 resource element groups (REG), and each REG is distributed to control area based on cell ID (ID).A REG comprises 4 resource elements (RE).RE is multiplied by an OFDM symbol by the minimal physical resource of a subcarrier definition.PCFICH is according to bandwidth instruction 1 to 3 or 2 to 4.Modulation PCFICH in Quadrature Phase Shift Keying (QPSK).
PHICH is physical mixed-automatic repeat request (HARQ) indicator channel of carrying for the HARQACK/NACK of ul transmissions.That is, PHICH is the channel of the DLACK/NACK information of sending for ULHARQ.PHICH comprises a REG and by community specifically scrambling.ACK/NACK indicates with a bit and modulates with binary phase shift keying (BPSK).Modulated ACK/NACK expands with the spreading factor (SF) of 2 or 4.The multiple PHICH being mapped to same asset form PHICH group.The number of the PHICH being multiplexed into PHICH group is determined according to the number of extended code.PHICH(group) by triplicate to obtain the diversity gain in frequency domain and/or time domain.
PDCCH is assigned to the physical downlink control channel of n OFDM symbol before subframe.At this, n is 1 or the larger integer that are indicated by PCFICH.PDCCH is made up of one or more CCE.PDCCH to the carrying of each UE or UE group about the resource allocation information of transfer channel, PCH and DL-SCH, uplink scheduling license and HARQ information.PDSCH launches PCH and DL-SCH.Therefore, except specific control information or special services data, eNB and UE transmits and receives data usually on PDSCH.
PDCCH sends instruction one or more UE receive the information of PDSCH data and indicate supposition UE how to receive the decode the information of PDSCH data.Such as, suppose that the Cyclic Redundancy Check of specific PDCCH is sheltered by radio net temporary mark (RNTI) " A ", and launch about based on transport format information (such as in specific sub-frame, transmission block size, modulation scheme, compiling information etc.) " C " at radio resource " B " (such as, at frequency location place) information of data of launching, the UE in community uses its RNTI information monitoring PDCCH.If one or more UE have RNTI " A ", then these UE receive PDCCH and the PDSCH indicated by " B " and " C " based on the receives information of the PDCCH received.
Fig. 6 diagram is used to the Resource Unit configuring control channel.Particularly, when the number of transmission (Tx) antenna is in the enb 1 or 2, Fig. 6 (a) diagram is used to the Resource Unit configuring control channel, and when the number of Tx antenna is in the enb 4, Fig. 6 (b) diagram is used to the Resource Unit configuring control channel.Although use different reference signal (RS) patterns according to the number of Tx antenna, the Resource Unit that configuration is relevant with control channel in an identical manner.
With reference to figure 6, the basic resource unit of control channel is REG.REG comprises four continuous print resource elements (RE) except the RE being used to RS.Runic square expression REG in figure 6.PCFICH and PHICH comprises 4 REG and 3 REG respectively.PDCCH is made up of control channel element (CCE), and each CCE comprises 9 REG.
In order to determine whether as UE subscribes the PDCCH with L CCE, UE be configured to ad hoc rules arrange or continuous print M (L)(>=L) individual CCR.UE can consider a plural L value, for PDCCH reception.The CCE collection that should monitor for PDCCH reception UE is called as search volume.Such as, in LTE system as illustrated definition search volume in [table 1] below.
[table 1]
CCE is polymerized level, and L is the number of the CCE in PDCCH, S k (L)represent that CCE is polymerized the search volume of horizontal L, and M (L)it is the number of the PDCCH candidate that will be monitored in the search volume with the horizontal L of CCE polymerization.
Search volume can be classified into only to the specific search volume of the addressable UE of particular UE with to the addressable public search space of all UE.UE monitors have the public search space of CCE polymerization level 4 and 8 and have the specific search volume of UE of CCE polymerization level 1,2,4 and 8.Public search space can be overlapping with the specific search volume of UE.
Namely a CCE(in PDCCH search space, has the CCE of minimum index) position be assigned to UE, for each CCE, polymerization level changes in each subframe.This is called as PDCCH search space hashing (PDCCHsearchspacehashing).
Fig. 7 is shown in the example of CCE that system band distributes.With reference to figure 7, multiple CCE of continuous print is in logic imported into interleaver.Interleaver changes the arrangement of multiple input CCE based on REG.Therefore, in the control area of subframe, the time/frequency resource of a CCE be physically distributed to total time/frequency domain.As a result, although configure control channel based on CCE, interweave based on REG, thus maximize frequency diversity and interference randomization gain.
Fig. 8 illustrates the structure of the UL subframe in LTE system.
Control area and data area can be divided into reference to figure 8, UL subframe.The physical uplink control channel (PUCCH) comprising uplink control information (UCI) is assigned to control area, and the physical uplink link shared channels (PUSCH) comprising user data is assigned to data area.The centre of subframe is assigned to PUSCH, and the both sides with the data area in time-frequency domain are assigned to PUCCH.The control information that PUCCH launches can comprise HARQACK/NACK, represent the CQI of downlink channel status, for the RI of multiple-input and multiple-output (MIMO), the dispatch request (SR) of expression UL Resourse Distribute.PUCCH for a UE takies a Resource Block (RB) with different frequency in each time slot of subframe.That is, two RB are assigned to the PUCCH of frequency hopping on the boundary of time slot of subframe.Particularly, the PUCCH with m=0, m=1 and m=2 is assigned to the subframe in Fig. 7.
To the particular radio resource of UE be assigned to (such as according to business load change at eNB, DL or UL sub-frame resources) use dynamically change into DL or UL when using, the invention provides a kind of method for effectively cancelling possible interference and sub-frame transmission/receptions (Tx/Rx) regularly to support the method efficiently.
Before describing proposed method in detail, first will be described in the available UL-DL configuration defined in 3GPPLTE-TDD system.
[table 2]
In [table 2], D, U and S of being assigned to number of subframes represent DL subframe, UL subframe and special subframe respectively.[table 3] is below listed for launching in response to DL signal the UL number of subframes (index) used in ULACK/NACK at UE place in 3GPPLTE-TDD system.
[table 3]
In [table 3], '-' represent the configuration of the subframe as UL subframe, and the numeral being assigned to each number of subframes is linked to the index of the UL subframe of the DL subframe with number of subframes.
Be used in the specific fields of the control information that physical control channel is launched as designator, dynamically can determine whether the particular radio resource (DL or UL resource) being assigned to UE is used to DL or UL.Such as, specific fields can be carrier indication field (CIF), down link assignment indexing (DAI) or UL index.Or different UL-DL configurations can indicate the use of particular radio resource to be changed by the specific special RRC signaling of UE.In other method, different UL-DL configurations can be indicated by UE specific special RRC signaling, and whether (on physical control channel) can be changed by the designator of the use of additionally launching instruction particular radio resource.By this way, the use of radio resource can be changed.
Fig. 9 illustrative exemplary dynamic subframe allocation plan.Particularly, when illustrated Fig. 9, UE1 and UE2 configures #1 operation according to UL-DL.
With reference to figure 9, although two UE are according to identical UL-DL configuration operation, the use of UL subframe (SF) #3 and ULSF#8 of UE1 can be dynamically altered to make them be used to DL transmission.If UE1 and UE2 is connected to identical eNB, then can make not transmit in SF#3 and SF#8 of UE2 by operation dispatching.If or UE1 and UE2 is connected to different eNB, then DL from eNB1 to UE1 transmission may disturb the UL from UE2 to eNB2 transmit (eNB to eNB interference) or the UL that comes from UE2 transmits the DL of UE1 may be disturbed to receive (UE to UE interference).In order to reduce interference, the information that X2 interface (or on specific preset radio channel) shares the position about the candidate that can change its use between cells can be passed through.Some restrictions can be forced to SF#3 and SF#8 of UE2 from the angle specific cell of scheduling, or the UL transmission in SF#3 and SF#8 of UE2 as described in the previous can be forbidden.
On the contrary, if the use of SF#3 and SF#8 of UE1 is switched to UL transmission again, then above-mentioned interference may not be there is.
Figure 10 illustrates another exemplary dynamic sub-frame configuration scheme.
With reference to Figure 10, be utilized as the different UL-DL configuration that two UE are arranged, the use of UL subframe (SF) #3 and ULSF#8 of UE1 can be dynamically altered, and makes them be used to DL transmission.If DL-UL configuration is changed into left side situation by from the right situation, then the interference phenomenon that earlier in respect of figures 9 describes occurs.Therefore, aforesaid method can be applied to UE1 in an identical manner.
If specific subframe as above is dynamically changed into UL subframe by from DL subframe, then in fixing DL subframe, preferentially perform the measurement of such as provided for radio resources management (RRM).Because place by the subframe being dynamically configured to DL subframe in different interference environments, so by configuration CSI measuring set preferentially independent measurement channel condition information (CSI) etc.For this purpose, consider the feature of disturbance environment, by higher level signaling or physical layer signaling, eNB can indicate UE to be used for the subframe collection of such as RRM/RLM/CSI measurement.Significantly, be close to eNB and signal can be transmitted into the UE being connected to contiguous eNB.Such as, be close to eNB and can will measure relevant information transmitting to the UE being connected to contiguous eNB.Relevant information can be measured based on generating for information about about the information of position changing the candidate that it uses possibly shared between community or the measurement of adjacent cell.
If or for independent UE change UL-DL configuration, then before and after UL-DL configuration variation jointly only in DL subframe UE can perform measurement.This operation rules can be shared in advance by higher level signaling (or physical layer signaling).When traditional UE with its DL-UL is configured the A-UE be dynamically allocated coexist time, so traditional UE is only performing measurement in DL subframe with the identical position that (or semi-statically) configures the subframe of DL subframe by statically for A-UE.ENB can by higher level signaling (or physical layer signaling) by about A-UE statically (or semi-statically) be additionally transmitted into traditional UE as the information of the position of the subframe of DL subframe.
In addition, in DL subframe, the restricted measurement scheme of operating resource (such as, in specific sub-frame, only perform the scheme of measurement) UE can not perform measurement, this DL subframe be arrange restricted measured zone moment its be fixing DL subframe, then experienced UL-DL configuration in change.That is, UE come from its UL-DL in the middle of the DL subframe being configured to restricted measured zone configuration do not have to perform measurement in reformed DL subframe.Such as, when configuring (namely according to specific UL-DL, UL-DL configures #x) any time during the measurement of resource-constrained system point UE is switched to another UL-DL and configures (namely, UL-DL configures #y) time, being configured in UL-DL configuration #x and UL-DL configuration #y can perform measurement in the subframe of (or being fixed to) DL subframe.
Meanwhile, when the use of the subframe as LTE subframe with regular length be dynamically altered transmit for UL/DL, the propagation delay suitably considering between eNB and UE is necessary to design subframe structure.
Figure 11 diagram arranges the problem that DL subframe and UL subframe run in a tdd system at predetermined intervals.
With reference to Figure 11, although arrange DL subframe and UL subframe at predetermined intervals from the angle of eNB, because propagation delay can not to be alignd subframe from the angle of UE.Particularly, although UE is after receiving the DL signal predetermined time in DL subframe, the UL signal with suitable timing advance should be launched in the UL sub-frame, make UL signal arrive eNB in the timing be aligned.
In order to head it off, the present invention proposes, when eNB dynamically configures UL/DL subframe or eNB scheduling, dynamically to change the use of subframe, consider propagation delay design subframe structure.
Particularly; in order to the object of compensate for propagation delay; last or the first symbol in each DL or UL subframe can be set to protective time slot (GP) or delete the last of remaining each DL or UL subframe or the first symbol by eNB, makes the last of each DL or UL subframe or the first symbol can not be used to significant Signal transmissions.This operation can be interpreted as the length (or length of GP) changing corresponding subframe according to the use of determined subframe.Therefore, eNB can by diffuse information or the specific signaling of UE by about be configured to DL or UL subframe subframe length information or about the information transmitting of the length of the GP in subframe to UE.
The present invention proposes a kind of method further, and when the use of UL subframe specific in LTETDDUL-DL configuration is changed to DL transmission, the method is used for compensate for propagation delay, and does not arrange GP.
Particularly, the satisfied UL subframe being close to the condition of the subframe of the subframe standing radio resource use change is used to the DL subframe (or being used to the UL subframe of DL transmission) that DL according to the present invention transmits.
In LTE TDD system, special subframe is inserted into so that guarantee the timing advance of the propagation delay compensation that DL transmits and UL transmission between a series of DL subframe and a series of UL subframe, or switches required time for UL-DL.
Figure 12 illustrates the use of the special subframe in TDD system.
With reference to Figure 12, special subframe comprises GP.From the angle of UE, if regulate the length of GP according to propagation delay, then special subframe and transmit timing of UL subframe shorter than general subframe is shifted to an earlier date.That is, UE can perform timing advance so that the reception of its UL signal timing alignd with UL sub-frame boundary in the enb.Therefore, for the GP of special subframe definition prevents overlapping between illustrated DL subframe and UL subframe in fig. 11.
Figure 13 and Figure 14 diagram changes the example of subframe structure according to an embodiment of the invention when dynamically changing the use of subframe.
With reference to Figure 13, if ULSF#3 is dynamically changed into DL subframe by eNB, then ULSF#3 aligns with ULSF#4 below.By this operation, the timing gap produced from the length of the GP regulated previous special subframe when in use ULSF#3 changes into DL subframe is useful.
That is, Figure 14 uses ULSF#3 as the result of DL subframe after being shown in the process of Figure 13.If the DLSF#3 before DLSF#4 changes into DL subframe, then all subframes of normally aliging when not having timing overlapping.Therefore, can compensate for propagation delay when not arranging GP.
Embodiments of the invention can be realized for the UE of the cell edge of experience service interference under different UL-DL configuration is assigned to the environment of adjacent cell.In addition, the present invention can be extended carrier aggregation (CA).Such as, the present invention can be applicable to jointly use the situation of certain components carrier wave (CC) in multiple community and each community arranges the use of CC independently.In addition, embodiments of the invention can be applicable to by main CC(PCC) in intersection carrier dispatching (CCS) change be assigned to auxiliary CC(SCC) the situation of use of existing particular radio resource.When the load condition (dynamically) according to the system in CA environment changes the use of (predetermined) specific resources of each CC of the communication be used between reflector and receiver, the present invention can be realized.The present invention can be extended based on PDCCH or evolution PDCCH(E-PDCCH) the various situations of communication.When extend carrier wave by additionally for communicating time, the present invention can be extended arrange extend carrier wave radio resource use or share extend carrier wave community between interference coordination.
The method proposed can be extended as device auto levelizer (D2D) communication in such communication and the special frequency band that distributes, or is used (or reusing) existing (community is specific) radio resource to be used for D2D communication by the use changing the radio resource in D2D communication environment.
Figure 15 is the block diagram of communication equipment according to an embodiment of the invention.
With reference to Figure 15, communication equipment 1500 comprises processor 1510, memory 1520, radio frequency (RF) module 1530, display module 1540 and user interface (UI) module 1550.
For the purpose of being described clearly, the communication equipment 1500 as having illustrated configuration is in fig .15 shown.Can add or omit some modules from communication equipment 1500.In addition, the module of communication equipment 1500 can be divided into more module.The embodiments of the invention that processor 1510 is configured to according to being described with reference to the drawings before carry out executable operations.Particularly, for the detailed operation of processor 1510, can referring to figs. 1 to the description of Figure 14.
Memory 1520 is connected to processor 1510, and storage operation system (OS), application, program code, data etc.RF module 1530 is connected to processor 1510, is RF signal or is baseband signal by RF signal down conversion by baseband signal up conversion.For this purpose, RF module 1530 combine digital-to-analog-converted, amplification, filtering and frequency up-converted or oppositely perform these process.Display module 1540 is connected to processor 1510, and shows various types of information.Display module 1540 can be configured to, but is not limited to, such as the known tip assemblies of liquid crystal display (LCD), light-emitting diode (LED) display and Organic Light Emitting Diode (OLED) display.UI module 1350 is connected to processor 1510, and can be configured by the combination of the known user interface of such as keyboard, touch-screen etc.
In the combination that above-described embodiments of the invention are element of the present invention and feature.Unless otherwise mentioned, element or feature can optionally be considered.Each element or feature can when putting into practice without the need to when element or integrate features with other.In addition, embodiments of the invention can be consisted of a part for composite component and/or feature.The operating sequence described in an embodiment of the present invention can be rearranged.Some structure of any one embodiment can be included in another embodiment, and can replace with the corresponding structure of another embodiment.Obvious to those skilled in the art, the claim mutually do not quoted clearly in the appended claims can present using the form of combination as embodiments of the invention, or after submission the application, be included as new claim by follow-up amendment.
Embodiments of the invention can by various means, and such as, hardware, firmware, software or its combination realize.In hardware configuration, one or more application-specific integrated circuit (ASIC) (ASIC), digital signal processor (DSP), digital signal processing device (DSDP), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor etc. can be passed through according to the method for exemplary embodiment of the present invention and realize.
In firmware or software merit rating, embodiments of the invention can realize with the form of module, process, function etc.Software code can be stored in the memory unit, and is performed by processor.Memory cell is positioned at inside or the outside of this processor, and can data is sent to processor via various known device and receive data from processor.
It should be appreciated by those skilled in the art that except those modes set forth herein, when not departing from spirit of the present invention and essential characteristic, the present invention can realize in other specific mode.Therefore above-described embodiment is interpreted as illustrative and nonrestrictive in all respects.Scope of the present invention by by appended claim and legal equivalents thereof, and be can't help above description and is determined, and all changes fallen within the implication of appended claim and equivalent scope are intended to be included therein.
Industrial applicability
Although described preceding method for dynamically configuring the subframe in wireless communication system and equipment by example under the context of 3GPPLTE system, they also can be applicable to other various wireless communication system.

Claims (10)

1., for signal being transmitted into base station and the method from base station received signal at subscriber equipment place in a wireless communication system, described method comprises:
In the first subframe transmission of uplink signal and in the second subframe the first step of receiving downlink signal;
The designator of down link signal reception is changed in the use of the first subframe received instruction physical control channel from described base station; And
Receive if the use of described first subframe is changed to described down link signal, then the second step of receiving downlink signal in described first and second subframes,
Wherein:
In described first step, protective time slot is inserted between described first and second subframes, and
In described second step, described protective time slot is positioned in the beginning of described first subframe and described first and second subframes are continuous print,
Wherein, the measurement result of the measurement result of the first subframe of described second step and the second subframe of described second step reported individually by described subscriber equipment.
2. method according to claim 1, wherein, described protective time slot is that transmission-reception switches the period.
3. method according to claim 1, wherein, the length of described protective time slot is equal to, or greater than timing advance, and described timing advance is used to timing match between described subscriber equipment and described base station or propagation delay.
4. method according to claim 1, wherein, described designator is carrier indication field (CIF) or downlink allocation index (DAI).
5. method according to claim 1, wherein, other subscriber equipment is not dispatched in described base station in described first subframe of described second step.
6. the subscriber equipment in wireless communication system, comprising:
Wireless communication module, described wireless communication module is used for signal being transmitted into base station and from base station received signal; And
Processor, described processor for the treatment of signal,
Wherein, described processor controls described wireless communication module to perform in the first subframe transmission of uplink signal and the first step of receiving downlink signal in the second subframe, the designator of down link signal reception is changed in the use of the first subframe received instruction physical control channel from described base station, if and the use of described first subframe is changed to the reception of described down link signal, performs the second step of receiving downlink signal in described first and second subframes
Wherein:
In described first step, protective time slot is inserted between described first and second subframes, and
In described second step, described protective time slot is positioned in the beginning of described first subframe and described first and second subframes are continuous print,
Wherein, the measurement result of the measurement result of the first subframe of described second step and the second subframe of described second step reported individually by described subscriber equipment.
7. subscriber equipment according to claim 6, wherein, described protective time slot is that transmission-reception switches the period.
8. subscriber equipment according to claim 6, wherein, the length of described protective time slot is equal to, or greater than timing advance, and described timing advance is used to timing match between described subscriber equipment and described base station or propagation delay.
9. subscriber equipment according to claim 6, wherein, described designator is carrier indication field (CIF) or downlink allocation index (DAI).
10. subscriber equipment according to claim 6, wherein, other subscriber equipment is not dispatched in described base station in described first subframe of described second step.
CN201280012880.3A 2011-04-11 2012-03-30 The dynamic subframe method to set up of wireless communication system and device thereof Expired - Fee Related CN103430468B (en)

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US201161527598P 2011-08-25 2011-08-25
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