CN101431363B - TDD system and its data transmission method - Google Patents

TDD system and its data transmission method Download PDF

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Publication number
CN101431363B
CN101431363B CN2007101771143A CN200710177114A CN101431363B CN 101431363 B CN101431363 B CN 101431363B CN 2007101771143 A CN2007101771143 A CN 2007101771143A CN 200710177114 A CN200710177114 A CN 200710177114A CN 101431363 B CN101431363 B CN 101431363B
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China
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special area
time slot
length
slot
subscriber equipment
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CN2007101771143A
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Chinese (zh)
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CN101431363A (en
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索士强
肖国军
潘学明
王可
王映民
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电信科学技术研究院
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Abstract

The invention discloses a method for transmitting data of a time division duplex system. The method comprises the following steps: a group of special area configurations comprising a protective gap GP time slot length, a DwPTS time slot length and a UpPTS time slot length with a symbol length as a unit are correspondingly set according to any compatibility requirement with a TD-SCDMA system in advance, and a corresponding relationship between each compatibility requirement and the group of special area configurations is stored in a base station; the base station determines a group of special area configurations currently corresponding to the compatibility requirement of the TD-SCDMA system according to the stored corresponding relationship; one of the group of the special area configurations is selected according to a coverage range, and the selected special area configuration is transmitted to user equipment; the user equipment and the base station construct a wireless frame field for data transmission according to the selected special area configuration. The invention also discloses a time division duplex system. By adopting the invention, different rate coverage with finer granularity can be supported, wireless resources are saved, and transmission efficiency is improved.

Description

A kind of tdd systems and data transmission method thereof

Technical field

The present invention relates to the Long Term Evolution scheme of tdd systems, particularly a kind of tdd systems and data transmission method thereof.

Background technology

3-G (Generation Three mobile communication system) (3G) adopts the CDMA multi-access mode, supports multimedia service, has higher competitiveness.In order to ensure in the longer time, keeping this competitiveness, 3GPP has started Long Term Evolution (Long Term Evolution, the LTE) research project of 3G wireless interface technology.

At present, the LTE system confirms to support 2 kinds of frame structures.TD-SCDMA is the standard of unique employing time division duplex (TDD) mode in three kinds of big international standards of 3-G (Generation Three mobile communication system); In the Long Term Evolution scheme (LTE TDD) of TD-SCDMA; Its first-selected frame structure is second type of frame structure with the TD-SCDMA system compatible, and is as shown in Figure 1.Wherein, the frame length of a radio frames is 10ms, comprises the field of two 5ms.Each field (is labeled as TS0~TS6) and 3 special time slots (descending pilot frequency time slot GwPTS time slot, protection is time slot GP time slot and uplink pilot time slot UpPTS time slot at interval) composition by 7 conventional time slots.Every subframe definition is a conventional time slot.Wherein, subframe 0 always is used for downlink transfer with descending pilot frequency time slot, and uplink pilot time slot and subframe 1 always are used for uplink.

LTE TDD system is based on the OFDM technology, and its subcarrier spacing is set at 15kHz, and corresponding OFDM symbol lengths is 66.67us, for separating timing realization OFDM symbol regularly, before each OFDM symbol, adds cyclic prefix CP.When supporting that unicast service and little covering are used, use the short CP of length as 4.76us, the complete OFDM symbol lengths that forms like this is 66.67us+4.76us ≈ 71.4us; When supporting that many cell broadcaste services are used with big covering, use the long CP of length as 16.66us, the complete OFDM symbol lengths that forms like this is 66.67us+16.66us ≈ 88.3us.

For the TDD system, for avoiding the interference between uplink and downlink timeslot, the switching point of its descending time slot to up time slot needs protection (GP) at interval, therefore as previously mentioned, in the wireless frame structure of LTE TDD system, has protection time slot at interval in the special time slot at present.The duration of concrete GP equals the time that electromagnetic wave propagation radius of society twice is experienced, i.e. T Gp=2*R CellMiddle R CellBe radius of society, C representes the light velocity (3*10 8M/s).

In frame structure shown in Figure 1, the duration of GP is 75us, and its corresponding maximum coverage range is (75us/2) * 3 * 10 8M/s=11.25km.For satisfying support to different coverages; Existing GP can make suitable modification, and specifically the method for designing about GP is: through vacant one or continuous a plurality of ascending time slot corresponding with the coverage of the being supported bigger up protection GP at interval that comes downwards to is provided.At length, generally provide three kinds of GP length to supply the base station to select at present according to the coverage of this sub-district.

One, under the situation of radius of society, use little covering frame structure as shown in Figure 2 to support that corresponding GP duration is 50us less than 7.5km.Insert at random at the UpPTS time slot and carry out this moment.

Two, for radius of society greater than 7.5km and less than the medium covering of 30km; GP length is not enough in second type of frame structure of basic TDD; Through GP and UpPTS are merged the new GP of formation, time span is 191.66us, then just can support the coverage of about 29km.At this moment, insert at random at TS1 or arbitrary thereafter ascending time slot and carry out.Second type of frame structure of TDD supports that the frame structure of medium covering is as shown in Figure 3.

Three, for the big covering scene of radius of society greater than 30km; The method that second type of frame structure of TDD adopts is that whole TS1 is available, and with GP, UpPTS merges; The time span that forms an integral body is the GP of 866.66us, enough supports the above sub-district of 100km to cover.At this moment, insert at random at TS2 and continuous thereafter a plurality of ascending time slots and carry out.The frame structure of second type of big covering of frame structure support of TDD is as shown in Figure 4.

Base station and user preserve above-mentioned three kinds of pairing frame structures of GP length scheme respectively.The base station is according to the coverage of this sub-district, selects a kind of in above-mentioned three kinds of schemes, and notifies the user of this sub-district with the GP length scheme of selecting.When carrying out transfer of data between base station and user afterwards, utilize the corresponding frame structure of corresponding GP length scheme to carry data and communicate.

When adopting aforesaid way to carry out transfer of data, because the adjustment granularity of GP length is an ascending time slot, when supporting that therefore different brackets covers; Differential bigger Deng inter-stage; Support underaction to coverage causes waste of radio resources, reduces efficiency of transmission.For example, be the sub-district of 50km for coverage, need to select the third GP length and corresponding frame structure to carry out transfer of data, time slot was used as protection and slatterned at interval in fact greatly this moment, had in fact also influenced efficiency of transmission.

Summary of the invention

In view of this, the present invention provides a kind of tdd systems and data transmission method thereof, can support more fine-grained different brackets to cover, and save radio resources improves efficiency of transmission.

For realizing above-mentioned purpose, the present invention adopts following technical scheme:

A kind of data transmission method of tdd systems comprises:

In advance based on the arbitrary and compatible requirement TD-SCDMA system; Correspondence is provided with one group and comprises with the symbol lengths being the protection special area configuration of GP time slot, DwPTS time slot and UpPTS slot length at interval of unit, and in the base station, preserves each said compatible requirement and said one group of special area configured corresponding relation;

The current one group special area configuration corresponding with the compatibility requirement of TD-SCDMA system confirmed based on the corresponding relation of preserving in the base station; And, in said one group of special area configuration, select a kind ofly based on coverage, and the special area configuration of selecting sent to subscriber equipment;

Transfer of data is carried out according to the special area arrangement radio half frame of selecting in subscriber equipment and base station.

Preferably, said based on the arbitrary and compatible requirement TD-SCDMA system, correspondence is provided with one group of special area and is configured to: based on the arbitrary and compatible requirement TD-SCDMA system, correspondence is provided with all possible special area configuration.

Preferably, saidly the special area configuration of selecting sent to subscriber equipment be:

The starting point and the terminal point of GP time slot are sent to subscriber equipment in the side-play amount of special area; Said side-play amount is unit with the symbol;

Perhaps, the starting point with the GP time slot sends to subscriber equipment at the side-play amount and the GP slot length of special area; Said side-play amount is unit with the symbol.

Preferably, said based on the arbitrary and compatible requirement TD-SCDMA system, correspondence is provided with one group of special area and is configured to: based on the arbitrary and compatible requirement TD-SCDMA system, all special areas configurations of satisfying the pre-set limit condition are set.

Preferably, said restrictive condition is the span of the UpPTS slot length that is provided with in advance.

Preferably, conventional structure of time slot is in the said radio half frame: comprise in the radio half frame that 8 length are the conventional time slot of 0.5ms, per two conventional time slots are composed of a sub-frame;

The span of said UpPTS slot length is: when coded identification adopted weak point CP, the length of UpPTS time slot was 0 or 2 or 6 or 7 or 11 symbol; When coded identification adopted long CP, the length of UpPTS time slot was 0 or 2 or 5 or 6 or 9 symbol.

Preferably, when coded identification adopted weak point CP, said all special areas that satisfy the pre-set limit condition were configured to:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 11∶1∶2 Dw∶GP∶Up 1∶2∶11 Dw∶GP∶Up 6∶2∶6 Dw∶GP∶Up 5∶2∶7 The GP slot length Dw Up Dw Up Dw Up Dw Up 1 11 2 2 10 2 1 11 6 6 5 7 3 9 2 5 6 5 6 4 8 2 4 6 4 6 5 7 2 3 6 3 6 6 6 2 1 7 7 5 2 1 6 8 4 2 9 3 2 10 2 2 2 2 2 2 11 1 2 1 2 1 2 1 2 12 2 0 2 0 2 0 2 0

When coded identification adopted long CP, said all special areas that satisfy the pre-set limit condition were configured to:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 9∶1∶2 Dw∶GP∶Up 1∶2∶9 Dw∶GP∶Up 5∶2∶5 Dw∶GP∶Up 5∶1∶6 The GP slot length Dw Up Dw Up Dw Up Dw Up 1 9 2 5 6 2 8 2 1 9 5 5 5 5 3 7 2 4 5 4 5

4 6 2 3 5 3 5 5 5 2 1 6 2 5 2 5 6 4 2 1 5 7 3 2 8 2 2 2 2 2 2 9 1 2 1 2 1 2 1 2 10 2 0 2 0 2 0 2 0

Wherein, the length of DwPTS time slot, GP time slot and UpPTS time slot all is unit with the symbol.

Preferably, said pre-set limit condition further comprises the restriction to the GP slot length.

Preferably, when coded identification adopted short CP, being restricted to of said GP slot length: the GP slot length was 2 or 5 or 10 or 13 symbols; Said all special areas that satisfy the pre-set limit condition are configured to:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 11∶1∶2 Dw∶GP∶Up 1∶2∶11 Dw∶GP∶Up 6∶2∶6 Dw∶GP∶Up 5∶2∶7 The GP slot length Dw Up Dw Up Dw Up Dw Up 2 10 2 1 11 6 6 5 7 5 7 2 3 6 3 6 10 2 2 2 2 2 2 13 1 0 1 0 1 0 1 0

When coded identification adopted long CP, being restricted to of said GP slot length: the GP slot length was 2 or 4 or 8 or 11 symbols; Said all special areas that satisfy the pre-set limit condition are configured to:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 9∶1∶2 Dw∶GP∶Up 1∶2∶9 Dw∶GP∶Up 5∶2∶5 Dw∶GP∶Up 5∶1∶6 The GP slot length Dw Up Dw Up Dw Up Dw Up 2 8 2 1 9 5 5 5 5 4 6 2 3 5 3 5 8 2 2 2 2 2 2 11 1 0 1 0 1 0 1 0

Wherein, the length of DwPTS time slot, GP time slot and UpPTS time slot all is unit with the symbol.

Preferably, said restrictive condition is: for the descending ascending time slot ratio of every kind of different TD-SCDM system, the UpPTS slot length is a regular length;

Said all special areas that satisfy the pre-set limit condition that are provided with are configured to: for the descending ascending time slot ratio of every kind of different TD-SCDM system,

In the duration scope of said special area; It is said regular length that the UpPTS slot length is set, and the GwPTS slot length begins from maximum occurrences, is that unit reduces successively with the symbol lengths; The GP slot length begins from minimum value, is that unit increases successively with the symbol lengths.

Preferably, the conventional structure of time slot in the said radio half frame is: comprise in the radio half frame that 8 length are the conventional time slot of 0.5ms, per two conventional time slots are composed of a sub-frame;

When coded identification adopted weak point CP, said all special areas that satisfy the pre-set limit condition were configured to:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 11∶1∶2 Dw∶GP∶Up 1∶2∶11 Dw∶GP∶Up 6∶2∶6 Dw∶GP∶Up 5∶2∶7 The GP slot length Dw Up Dw Up Dw Up Dw Up 1 11 2 2 10 2 1 11 6 6 5 7 3 9 2 5 6 4 7 4 8 2 4 6 3 7 5 7 2 3 6 2 7 6 6 2 2 6 1 7 7 5 2 1 6 8 4 2 9 3 2 10 2 2 11 1 2 13 1 0 1 0 1 0 1 0

When coded identification adopted long CP, said all special areas that satisfy the pre-set limit condition were configured to:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 9∶1∶2 Dw∶GP∶Up 1∶2∶9 Dw∶GP∶Up 5∶2∶5 Dw∶GP∶Up 5∶1∶6 The GP slot length Dw Up Dw Up Dw Up Dw Up 1 9 2 5 6 2 8 2 1 9 5 5 4 6 3 7 2 4 5 3 6 4 6 2 3 5 2 6 5 5 2 2 5 1 6 6 4 2 1 5 7 3 2 8 2 2 9 1 2 11 1 0 1 0 1 0 1 0

Wherein, the length of DwPTS time slot, GP time slot and UpPTS time slot all is unit with the symbol.Preferably, said pre-set limit condition further comprises the restriction to the GP slot length.

Preferably, when coded identification adopted short CP, being restricted to of said GP slot length: the GP slot length was 2 or 3 or 4 or 5 or 10 symbols; Said all special areas that satisfy the pre-set limit condition are configured to:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 11∶1∶2 Dw∶GP∶Up 2∶2∶10 Dw∶GP∶Up 6∶2∶6 Dw∶GP∶Up 5∶2∶7 The GP slot length Dw Up Dw Up Dw Up Dw Up 2 10 2 1 11 6 6 5 7 3 9 2 5 6 4 7 4 8 2 4 6 3 7 5 7 2 3 6 2 7 10 2 2

When coded identification adopted long CP, being restricted to of said GP slot length: the GP slot length was 1 or 2 or 3 or 4 or 8 symbol; Said all special areas that satisfy the pre-set limit condition are configured to:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 9∶1∶2 Dw∶GP∶Up 2∶1∶9 Dw∶GP∶Up 5∶2∶5 Dw∶GP∶Up 5∶1∶6 The GP slot length Dw Up Dw Up Dw Up Dw Up 1 9 2 5 6 2 8 2 1 9 5 5 4 6 3 7 2 4 5 3 6 4 6 2 3 5 2 6 8 2 2 2 0

Wherein, the length of DwPTS time slot, GP time slot and UpPTS time slot all is unit with the symbol.

Preferably, in advance for corresponding all special areas that satisfy the pre-set limit condition of all compatible requirements are configured into line number, and in base station and subscriber equipment, preserve special area configuration and the corresponding relation of numbering;

Said base station sends to subscriber equipment with the special area configuration of selecting: the base station sends to subscriber equipment with the corresponding numbering of selecting of special area configuration;

Said subscriber equipment based on the special area arrangement radio half frame of selecting is: subscriber equipment is confirmed its corresponding special area configuration based on the numbering that receives, and based on this special area arrangement radio half frame.

Preferably, subset division is carried out in advance that all compatible requirements are corresponding all special areas configurations of satisfying the pre-set limit condition, for different subsets is provided with numbering, and in each sub-set, disposes numbering for all different special area configuration correspondences are provided with; In base station and subscriber equipment be that unit preserves all special areas configurations, and preserve in the corresponding numbering of subclass and the subclass the corresponding configuration of each special area configuration and number with the subclass.

Preferably, said base station sends to subscriber equipment with the special area configuration of selecting and is: the base station sends to subscriber equipment with the numbering of the special area configuration place subclass of selecting with corresponding configuration numbering.

Preferably; Said base station sends to subscriber equipment with the special area configuration of selecting: if the numbering of the selected special area configuration of subscriber equipment known base station place subclass, only that the special area configuration of selecting is the corresponding configuration numbering in base station sends to subscriber equipment.

Preferably; Said subscriber equipment according to the special area arrangement radio half frame of selecting is: subscriber equipment is confirmed the subclass at special area configuration place according to the subclass numbering; And according to the configuration numbering that receives; In this subclass, confirm corresponding special area configuration, according to this special area arrangement radio half frame.

Preferably, said when carrying out subset division the compatibility of basis and TD-SCDMA system require to carry out.

A kind of tdd systems; Comprise base station and subscriber equipment; Said base station; According to the descending ascending time slot ratio of arbitrary TD-SCDMA system, correspondence is provided with one group and comprises with the symbol lengths being the protection special area configuration of GP time slot, DwPTS time slot and UpPTS slot length at interval of unit, and in the base station, preserves each said descending ascending time slot ratio and said one group of special area configured corresponding relation; According to the said corresponding relation of preserving, confirm one group of corresponding special area configuration of descending ascending time slot ratio of current TD-SCDMA system; And, in said one group of special area configuration, select a kind ofly according to current coverage range, and the special area configuration of selecting sent to subscriber equipment; Special area arrangement radio half frame according to selecting is carried out transfer of data;

Said subscriber equipment is used to receive the special area configuration of sending the base station, and carries out transfer of data according to this special area arrangement radio half frame.

Visible by technique scheme; Among the present invention; According to the arbitrary and compatible requirement TD-SCDMA system, correspondence is provided with one group of special area configuration in advance, and in the base station, preserves each said descending ascending time slot ratio and said one group of special area configured corresponding relation.Wherein, the special area configuration comprises: be the length of protection interval GP time slot, DwPTS time slot and the UpPTS time slot of unit with the OFDM symbol lengths.The current one group special area configuration corresponding with the compatibility requirement of TD-SCDMA system confirmed based on the corresponding relation of preserving in the base station; And, in said one group of special area configuration, select a kind ofly based on coverage, and and the special area configuration of selecting being sent to subscriber equipment, transfer of data is carried out based on the special area arrangement radio half frame of selection in subscriber equipment and base station.After adopting the mode of the invention described above; Because the GP slot length is that unit is provided with the OFDM symbol, and therefore the duration of an OFDM symbol will be much smaller than the duration of the conventional time slot in the frame structure shown in Figure 1; Adjustment granularity for the GP slot length reduces; Thereby can support more fine-grained different brackets to cover, save radio resources improves efficiency of transmission.

Description of drawings

Fig. 1 is the frame structure sketch map of present LTE TDD system.

Fig. 2 is a present LTE TDD system little covering frame structure sketch map.

Fig. 3 is a present LTE TDD system medium covering frame structure sketch map.

Fig. 4 is a present LTE TDD system big covering frame structure sketch map.

Fig. 5 is the data transmission method overview flow chart of tdd systems among the present invention.

Fig. 6 is the overall construction drawing of tdd systems provided by the invention.

Fig. 7 is the wireless frame structure sketch map of LTE TDD system in the embodiment of the invention.

Fig. 8 is the data transmission method particular flow sheet of tdd systems in the embodiment of the invention one.

Fig. 9 is that minimum covers when requiring to adopt weak point CP down in the embodiment of the invention one, GP time slot, DwPTS time slot and UpPTS slot length set-up mode sketch map.

Figure 10 minimumly in the embodiment of the invention one covers when requiring to adopt down long CP GP time slot, DwPTS time slot and UpPTS slot length set-up mode sketch map.

Figure 11 is first kind of identification means of special area allocation plan in the embodiment of the invention one.

Figure 12 is second kind of identification means of special area allocation plan in the embodiment of the invention two.

Figure 13 is the data transmission method particular flow sheet of tdd systems in the embodiment of the invention two.

Embodiment

For making the object of the invention, technological means and advantage clearer, the present invention is explained further details below in conjunction with accompanying drawing.

Basic thought of the present invention is: reduce the adjustment granularity of GP slot length, different brackets covers thereby provide more flexibly.

Fig. 5 is the data transmission method overview flow chart of tdd systems among the present invention.As shown in Figure 1, this method comprises:

Step 501, in advance according to the arbitrary and compatible requirement TD-SCDMA system, correspondence is provided with one group of special area configuration, and in the base station, preserves each compatible requirement and said one group of special area configured corresponding relation; Wherein, the special area configuration comprises: be the length of protection interval GP time slot, DwPTS time slot and the UpPTS time slot of unit with the OFDM symbol lengths.

Special area refers in second type of frame structure among the present invention, three zones that special time slot constitutes in the radio half frame of 5ms.Among the present invention, the GP slot length can be that granularity is adjusted with the OFDM symbol in the special area.

Here; Be that unit is provided with the GP slot length why with the OFDM symbol; Be because the coded modulation scheme that in the LTETDD system, adopts is the OFDM modulation of OFDM modulation or expansion; And the symbol lengths of these two kinds of modulation systems is all identical, is that an OFDM symbol is a unit, is that unit carries out resource allocation with an OFDM symbol therefore.In ensuing literature record, a shared duration of OFDM symbol is called a symbol.

Step 502, base station are confirmed the current one group special area configuration corresponding with the compatibility requirement of TD-SCDMA system based on the corresponding relation of preserving in the step 501.

Step 503 based on coverage, is selected a kind ofly in one group of special area configuration in step 502, confirming, and the special area configuration of selecting sent to subscriber equipment.

Step 504, subscriber equipment and base station are according to the special area configuration of selecting in the step 503, and the structure radio half frame is carried out transfer of data.

So far, data transmission method flow process provided by the invention finishes.

Fig. 6 is the overall construction drawing of tdd systems provided by the invention.As shown in Figure 6, this system comprises: base station and subscriber equipment.

In this system, the base station is used for being directed against in advance any compatible requirement to the TD-SCDMA system, and correspondence is provided with at least a special area configuration; Said special area configuration comprises: be the length of protection interval GP time slot, DwPTS time slot and the UpPTS time slot of unit with the OFDM symbol lengths; According to current compatible requirement, confirm all corresponding special area configurations to the TD-SCDMA system; And, in said all special areas configuration, select a kind ofly according to coverage, and the special area configuration of selecting sent to subscriber equipment; Special area arrangement radio half frame according to selecting is carried out transfer of data.

Subscriber equipment is used to receive the special area configuration of sending the base station, and carries out transfer of data according to this special area arrangement radio half frame.

More than be to overview of the present invention, visible by this process, the granularity that is provided with of method GP slot length of the present invention reduces, and different brackets covers thereby can provide more flexibly, improves efficiency of transmission.But because the flexible adjustment of GP slot length is in the special area scope, to carry out, so GP slot length adjusting range limits by the duration of special area, and just the maximum coverage range supported of this radio half frame is limited by the duration of special area.Preferably, than frame structure shown in Figure 1, the duration of lengthening special area, thus can the modulation range of GP slot length be enlarged, and then enlarge maximum coverage range.Certainly, owing to the length of radio half frame is fixed, so the variation of special area duration can have influence on the duration of other conventional time slots.In the specific embodiment of the present invention below, be example, embodiment of the present invention is described with a kind of new wireless frame structure.

Fig. 7 is a wireless frame structure new in the embodiment of the invention.Wherein, the radio half frame of each 5ms is divided into conventional time slot and 1 special area that length is 1ms that 8 length are 0.5ms, and this special area is by the DwPTS time slot, and GP time slot and UpPTS time slot constitute, and in addition, per two conventional time slots are composed of a sub-frame.With this wireless frame structure is that basic specific embodiments of the invention describes.

Embodiment one:

Fig. 8 is the data transmission method particular flow sheet of tdd systems in the embodiment of the invention one.As shown in Figure 8, this method comprises:

Step 801, based on the arbitrary and compatible requirement TD-SCDMA system, the corresponding setting comprises all possible one group of special area configuration, and each said compatibility of preservation requires and one group of special area configured corresponding relation in the base station.

In the practical application, in the base station range of LTE TDD system, possibly there is the TD-SCDMA network,, when GP time slot, DwPTS time slot and UpPTS slot length are set, needs to consider the compatibility of two systems for guaranteeing the signal quality of two networks.So-called compatibility is meant that in two simultaneous zones of system, the up-downgoing relation of two kinds of systems need be consistent, and promptly up and descending switching point aligns, thereby guarantees not interfere with each other between two systems.Because LTE TDD system is the evolution system of TD-SCDMA system, therefore, generally is the system that in the zone, pre-exists TD-SCDMA; When using the method for the embodiment of the invention; Preferably, when LTE TDD system wireless frame designs, can keep compatible with the TD-SCDMA system.

Compatibility among the present invention requires to comprise two aspects at first, whether need compatible TD-SCDMA system, secondly, under the prerequisite of compatible TD-SCDMA system, the descending ascending time slot proportionate relationship of compatible TD-SCDMA system.

If do not need compatible TD-SCDMA system, need not consider the parameter of TD-SCDMA system so, all possible special area configuration directly is set.

Compatible TD-SCDMA system need be provided with all possible special time slot configuration so according to the descending ascending time slot ratio of TD-SCDMA system if desired.Concrete set-up mode when introduction needs compatible TD-SCDMA system below.

The frame structure of describing in the wireless frame structure of TD-SCDMA system and the background technology shown in Figure 2 is identical.Wherein, co-exist in six kinds of uplink and downlink timeslot ratio relations and corresponding up-downgoing switching point position.The GP slot length of TD-SCDMA is 75us; For guaranteeing compatibility, need to satisfy the condition of two aspects: one, the GP slot length of LTE TDD system can not be that unit calculates with the OFDM symbol less than 75us; When adopting weak point CP; The GP slot length of LTE TDD system is at least two OFDM symbols, and when adopting long CP, the GP slot length of LTE TDD system is at least an OFDM symbol; Proportionate relationship between the shared duration of two, up-downgoing resource will with the TD-SCDMA system in consistent; Consider this point; When GP time slot, DwPTS time slot and UpPTS slot length are provided with in carrying out LTE TDD system; Also need further to carry out according to the structure of conventional time slot, specifically this structure comprises the duration of conventional time slot and with the position relation of special area etc.

The structure of conventional time slot is as shown in Figure 7 in the present embodiment as previously mentioned.Two adjacent conventional time slots are as a sub-frame, two conventional time slots when carrying out resource allocation in one sub-frame or be ascending time slot, or be descending time slot.According to the condition that above-mentioned compatible needs satisfy, promptly the up-downgoing switching point is consistent, and the GP time slot in the covering of the GP time slot in the LTE TDD system TD-SCDMA system, can obtain all kinds of possible special area allocation plans.Describe for simplifying, minimum to cover the mode that requires (being that the GP slot length is 2 or 1) down to obtain various special area allocation plans be that example describes to satisfy below.

According to the various descending ascending time slot proportionate relationship of TD-SCDMA system, when satisfied minimum covering requires,, then can obtain different special area allocation plan shown in Figure 9 if adopt weak point CP, comprise GP time slot, DwPTS time slot and the setting of UpPTS slot length.

In Fig. 9, the signal of the frame structure of the first behavior TD-SCDMA system has wherein marked the switching point position under the different up-downgoing ratios.As, above this frame structure signal, indicating 6: 1 and represent that descending and ratio ascending time slot is 6: 1, the up-downgoing switching point is 6: 1 corresponding vertical dotted line.On behalf of the corresponding LTE TDD system wireless field of different time-gap ratio of TD-SCDMA system, second row respectively situation is set to the 7th row.

Particularly, in the 7th row, be labeled as the expression descending sub frame (two subframes that conventional time slot constitutes) of D at second row, be labeled as the expression sub-frame of uplink of U, dash area is represented special area.Wherein, when adopting weak point CP, special area comprises 14 symbols, below this special area, representes, in this special area, 1 district expression DwPTS time slot can be regarded descending time slot as, 2 districts expression GP time slot, and 3 districts expression UpPTS time slot can be regarded descending time slot as.Visible by Fig. 9, when the descending of TD-SCDMA system and ascending time slot ratio were 6: 1, LTE TDD system can adopt the time slot set-up mode of first row; It is 1 OFDM symbol of GwPTS Time Slot Occupancy; 2 OFDM symbols of GP Time Slot Occupancy, 11 OFDM symbols of UpPTS Time Slot Occupancy, like this; The up-downgoing switching point is consistent in up-downgoing switching point in the LTE TDD system (end of special area) and the TD-SCDMA system, and the GP time slot covers the GP time slot in the TD-SCDMA system simultaneously.Visible by figure, under other time slot ratios, be provided with and also satisfy above-mentioned condition according to mode shown in Figure 9, just detail no longer one by one here.

GP time slot, DwPTS time slot and the setting of UpPTS slot length also can be represented with table 1 in the LTE TDD system wireless field shown in Fig. 9.Wherein, If the narrow-mindedness ascending time slot ratio of TD-SCDMA system is 1: 6; Then according to the mode of present embodiment, second in the LTE TDD system corresponding diagram 9 gone, and obviously at this moment do not have the conventional time slot of transmitting downlink data; Therefore in practical application, can not adopt this special area configuration, so in table 1, do not comprise this kind situation.

The time slot ratio of TD-SCDMA system (down: on) DwPTS(S) GP(S) UpPTS(S) 2∶5 5 2 7 3∶4 1 2 11 4∶3 10 2 2 5∶2 6 2 6 6∶1 1 2 11

Table 1

Similarly,, when satisfied minimum covering requires,, then can obtain multiple special area shown in Figure 10 and dispose, specifically comprise GP time slot, DwPTS time slot and UpPTS slot length set-up mode if adopt long CP based on compatible requirement.Set-up mode shown in Figure 10 can be represented with table 2.

The time slot ratio of TD-SCDMA system (down: on) DwPTS(S) GP(S) UpPTS(S) 2∶5 5 1 6 3∶4 1 2 9 4∶3 9 1 2 5∶2 5 2 5 6∶1 1 2 9

Table 2

Shown in figure 10; At the compatible TD-SCDMA time slot ratio is 4: 3 o'clock; The scope that first symbol of UpPTS has got into GP time slot in the TD-SCDMA system in the LTE TDD system wireless field, under extreme case, the part of this symbol can receive the interference of the DwPTS of TD-SCDMA system.Have benefited from the CP structure of OFDM fortunately, this interference only influences CP, and therefore, this interference is negligible.

GP length is 1 or 2 symbol lengths in the special area allocation plan in above-mentioned Fig. 9, Figure 10, table 1 and the table 2, its coverage that can support be specially:

When (1) lacking CP, coverage is (2 * 71.4us/2) * 3 * 10 + 8=21.4km.

(2) during long CP, be that the coverage of 1 symbol is corresponding to the GP slot length: (83.3us/2) * 3 * 10 + 8=12.5km; Corresponding to the GP slot length is that the coverage of 2 symbols is: (2 * 83.3us/2) * 3 * 10 + 8=25km.

Above special area allocation plan covers in minimum and draws when requiring.Cover setting based on this minimum, can require adjustment GP slot length, obtain difference and cover the time slot settings under requiring according to covering.Particularly, can be according to the needs of coverage, cover based on this minimum and to be provided with, expansion GP slot length is promptly destroyed adjacent DwPTS time slot of GP time slot or the symbol in the UpPTS time slot or the symbol destroyed simultaneously among both is expanded the GP slot length.

For example, when adopting weak point CP, coverage enlarges one-level, and just making the GP slot length is 3 OFDM symbols, based on the third line in the set-up mode shown in Figure 9 (promptly compatible descending and 5: 2 situation of ascending time slot), two kinds of set-up modes can be arranged so:

One, with the OFDM symbol on the GP time slot left side also as the GP time slot, thereby make 3 symbols of GP Time Slot Occupancy, at this moment, 5 symbols of DwPTS Time Slot Occupancy, 6 symbols of UpPTS Time Slot Occupancy;

Two, with the symbol on GP time slot the right also as the GP time slot, thereby make 3 symbols of GP Time Slot Occupancy, at this moment, 6 symbols of DwPTS Time Slot Occupancy, 5 symbols of UpPTS Time Slot Occupancy.

By that analogy, can obtain all possible special area allocation plan.If the DwPTS time slot configuration is minimum length 80.57us, the UpPTS time slot configuration is minimum length 141.66us (establishing GT is 8.33us) simultaneously, and this moment, corresponding GP slot length was about 777.8us, supported the most approximately coverage of 116km.Corresponding special big covering demand also can be placed on special area ascending time slot afterwards with PRACH and realize, further enlarges the GP scope.

The compatible requirement of above-mentioned all possible special area allocation plan all corresponding certain and TD-SCDMA system.In this step, when requiring correspondence that the special area allocation plan is set, to the compatible requirement of any and TD-SCDMA system to different compatibility; Listed corresponding all possible special area allocation plan with it; And, know according to aforementioned, work as compatible requirement to any one and TD-SCDMA system; CP type according to coded identification adopted is different, and all corresponding special area allocation plans are also different.

Step 802, base station be according to the corresponding relation of preserving in the step 801, confirms that one group of corresponding special area of descending and ascending time slot ratio of current TD-SCDMA system disposes.

In this step, one group of special area configuration that current descending ascending time slot ratio is corresponding is confirmed according to the corresponding relation of preserving in the base station.Particularly, if compatibility is not required, then confirm not have under the compatible prerequisite that requires all possible special area allocation plan; If compatibility is had requirement, then confirm under the prerequisite of the uplink and downlink timeslot ratio relation that satisfies compatible TD-SCDMA system all possible special area allocation plan.

Step 803 according to the current coverage range of base station, is selected a kind of in one group of special area configuration in step 802, confirming.

In this step, according to coverage, can confirm the minimum length of GP time slot, concrete mode is: calculate the required up switching GP length T that comes downwards to according to coverage GP=2*R Cell/ C, the minimum length of GP time slot is set to take N symbol, and the GP length that calculates is less than the duration of N symbol, greater than the duration of N-1 symbol.Next; Select a kind of according to the minimum length of this GP time slot in all special area configurations of in step 802, confirming; If have a plurality of configurations all to satisfy the minimum requirement of this GP slot length, then can further select according to the business need of up-downgoing transfer of data.

Step 804 sends to subscriber equipment with the special area configuration of selecting in the step 803.

In the present embodiment, during weak point CP, the special area duration is 1ms, is made up of 14 OFDM symbols; During long CP: the special area duration is 1ms, is made up of 12 OFDM symbols.Simultaneously, in the special area, the position relation between DwPTS time slot, GP time slot and UpPTS time slot confirms that therefore, the special area configuration can perhaps identify with the starting point and the GP slot length of GP time slot through the starting point of GP time slot and the mode of terminal point.Be elaborated in the face of these two kinds of expression modes down.

If one adopts the starting point of GP time slot and the mode of terminal point to represent, shown in figure 11, (x1, x2) starting point and the side-play amount of terminal point in special area of expression GP, the unit is-symbol length of this side-play amount.If adopt short CP, special area comprises 14 symbols altogether, thus x1 or x2 have at most 15 kinds maybe: 0,1,2 ..., 14}; If adopt long CP, special area comprises 12 symbols altogether, thus x1 or x2 have at most 13 kinds maybe: 0,1,2 ..., 12}.By above-mentioned visible, no matter lack the situation of CP or long CP, side-play amount can be indicated by 4 bit informations.So, can be altogether by concrete special area configuration of 8bit information indication.

For example: one is configured to { DwPTS=5 symbol, GP=2 symbol, UpPTS=7 symbol }, can be expressed as: (01010111).(01010111) starting point of preceding four (0101) expression GP is counted behind the 5th symbol, and this has also confirmed that with regard to unique DwPTS is the from the 1st to the 5th symbol.(01010111) terminal point of back four (0111) expression GP is counted behind the 7th symbol, and this has confirmed that with regard to unique GP is the from the 6th to the 7th symbol, confirms also that simultaneously UpPTS is from 14 symbols of the 8th symbol to the.

If two adopt the starting point of GP time slot and the mode of GP slot length to represent, shown in figure 12, (x1, x2) side-play amount and the GP slot length of starting point in special area of expression GP, the unit is-symbol length of this side-play amount.

Particularly, if adopt short CP, special area comprises 14 symbols altogether, thus x1 or x2 have at most 15 kinds maybe: 0,1,2 ..., 14}; If adopt long CP, special area comprises 12 symbols altogether, thus x1 or x2 have at most 13 kinds maybe: 0,1,2 ..., 12}.By above-mentioned visible, no matter lack the situation of CP or long CP, side-play amount and length can be indicated by 4 bit informations.So, can be altogether by concrete special area configuration of 8bit information indication, preceding 4bit indication GP starting point, back 4bit indication GP length.

For example: one is configured to { DwPTS=5 symbol, GP=2 symbol, UpPTS=7 symbol }, can be expressed as: (01010010).(01010111) starting point of preceding four (0101) expression GP is counted behind the 5th symbol, and this has also confirmed that with regard to unique DwPTS is the from the 1st to the 5th symbol.(01010111) length of back four (0010) expression GP is 2 symbols, and this has confirmed that with regard to unique GP is the from the 6th to the 7th symbol, confirms also that simultaneously UpPTS is from 14 symbols of the 8th symbol to the.

In this step, the base station can be through the mode of high-level signaling, and broadcast channel etc. for example sends to subscriber equipment with the special area configuration of above-mentioned selection.

Step 805, subscriber equipment receive the special area configuration, confirm the length of GP time slot in the radio half frame, DwPTS time slot and UpPTS time slot; Subscriber equipment and base station utilize this radio half frame to carry out transfer of data.

So far, the method flow in the embodiment of the invention finishes.In the above-described embodiments, support all possible GP slot length, support abundant coverage condition.But under this execution mode, the length of DwPTS time slot and UpPTS time slot is any, especially when the UpPTS slot length not simultaneously, concrete conceptual design possibly compare difficulty, for example the design of pilot tone and control channel etc.Based on above-mentioned consideration, among the embodiment below above-mentioned special area allocation plan kind is simplified, thus the possibility of simplification UpPTS slot length.

Embodiment two:

Figure 13 is the particular flow sheet of data transmission method in the embodiment of the invention two.Shown in figure 13, this method comprises:

Step 1301 requires and restrictive condition according to arbitrary compatibility with the TD-SCDMA system, and correspondence is provided with one group of special area configuration, and preserves each compatible requirement and one group of special area configured corresponding relation.

In the present embodiment, restrictive condition is set in advance, to reduce the quantity of special area configuration.

Particularly, the restrictive condition of setting can be a restriction UpPTS slot length.Because under the prerequisite that guarantee to cover, during minimum GP slot length, if adopt short CP, then as shown in table 1, the UpPTS slot length possibly be 2,6,7 or 11 symbols; If adopt long CP, then as shown in table 2, the UpPTS slot length possibly be 2,5,6 or 9 symbols.Like this, in other GP length, or do not guarantee situation such as compatibility, the special time slot configuration also guarantees not increase the possibility of UpPTS, to reach the purpose of simplifying implementation complexity.

The restrictive condition that can obtain in the present embodiment based on above-mentioned consideration is: if adopt short CP, the UpPTS slot length can only be 0,2,6,7 or 11 symbol; If adopt long CP, the UpPTS slot length can only be 0,2,5,6 or 9 symbol.

Based on above-mentioned restrictive condition and different compatible requirements, when adopting short CP, can obtain the special area configuration shown in table 3 and table 4 respectively with long CP:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 11∶1∶2 Dw∶GP∶Up 1∶2∶11 Dw∶GP∶Up 6∶2∶6 Dw∶GP∶Up 5∶2∶7 The GP slot length Dw Up Dw Up Dw Up Dw Up 1 11 2 2 10 2 1 11 6 6 5 7 3 9 2 5 6 5 6 4 8 2 4 6 4 6 5 7 2 3 6 3 6 6 6 2 1 7 7 5 2 1 6 8 4 2 9 3 2 10 2 2 2 2 2 2 11 1 2 1 2 1 2 1 2 12 2 0 2 0 2 0 2 0

Table 3

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 9∶1∶2 Dw∶GP∶Up 1∶2∶9 Dw∶GP∶Up 5∶2∶5 Dw∶GP∶Up 5∶1∶6 The GP slot length Dw Up Dw Up Dw Up Dw Up 1 9 2 5 6 2 8 2 1 9 5 5 5 5 3 7 2 4 5 4 5 4 6 2 3 5 3 5 5 5 2 1 6 2 5 2 5 6 4 2 1 5 7 3 2 8 2 2 2 2 2 2 9 1 2 1 2 1 2 1 2 10 2 0 2 0 2 0 2 0

Table 4

With table 3 is that example describes, the compatible requirement of the first line display TD-SCDMA system, and being divided into is four types; Uplink and downlink timeslot ratio is 4: 3; 6: 1 or 3: 4,5: 2,2: 5; Show to this compatibility requirement in the corresponding tabulation of each compatible requirement, satisfy all special area allocation plans of above-mentioned restrictive condition.Wherein, because the GP slot length is unified in left column and representes, therefore 4: 3 places are listed as the length of having just listed out DwPTS time slot and UpPTS time slot in the slot length plan of establishment that marks.

In the present embodiment, preset restrictive condition can also for: under different time slot ratios, only change the DwPTS slot length, the UpPTS slot length is constant.That is to say; For the descending ascending time slot ratio of every kind of different TD-SCDM system, in the duration scope of special area, it is regular length that the UpPTS slot length is set; The GwPTS slot length begins from maximum occurrences; With the symbol lengths is that unit reduces successively, and the GP slot length begins from minimum value, is that unit increases successively with the symbol lengths.

Particularly; When coded identification adopts weak point CP; TD-SCDMA system descending and uplink ratio are that the length of 4: 3 o'clock UpPTS time slots is 2 or 0 symbols; TD-SCDMA system descending and uplink ratio are that the length of 6: 1 or 3: 4 o'clock UpPTS time slots is 11 or 0 symbols, and TD-SCDMA system descending and uplink ratio are that the length of 5: 2 o'clock UpPTS time slots is 6 or 0 symbols, and TD-SCDMA system descending and uplink ratio are that the length of 2: 5 o'clock UpPTS time slots is 7 or 0 symbols; When coded identification adopts long CP; TD-SCDMA system descending and uplink ratio are that the length of 4: 3 o'clock UpPTS time slots is 2 or 0 symbols; TD-SCDMA system descending and uplink ratio are that the length of 6: 1 or 3: 4 o'clock UpPTS time slots is 9 or 0 symbols; TD-SCDMA system descending and uplink ratio are that the length of 5: 2 o'clock UpPTS time slots is 5 or 0 symbols, and TD-SCDMA system descending and uplink ratio are that the length of 2: 5 o'clock UpPTS time slots is 6 symbols; The length of UpPTS time slot is 2 or 5 or 6 or 9 symbols; The length of DwPTS time slot is more than or equal to 1 symbol.

Based on above-mentioned restrictive condition and different compatible requirements, when adopting short CP, can obtain the special area configuration shown in table 5 and table 6 respectively with long CP:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 11∶1∶2 Dw∶GP∶Up 1∶2∶11 Dw∶GP∶Up 6∶2∶6 Dw∶GP∶Up 5∶2∶7 The GP slot length Dw Up Dw Up Dw Up Dw Up 1 11 2 2 10 2 1 11 6 6 5 7 3 9 2 5 6 4 7 4 8 2 4 6 3 7 5 7 2 3 6 2 7 6 6 2 2 6 1 7 7 5 2 1 6 8 4 2 9 3 2

10 2 2 11 1 2 13 1 0 1 0 1 0 1 0

Table 5

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 9∶1∶2 Dw∶GP∶Up 1∶2∶9 Dw∶GP∶Up 5∶2∶5 Dw∶GP∶Up 5∶1∶6 The GP slot length Dw Up Dw Up Dw Up Dw Up 1 9 2 5 6 2 8 2 1 9 5 5 4 6 3 7 2 4 5 3 6 4 6 2 3 5 2 6 5 5 2 2 5 1 6 6 4 2 1 5 7 3 2 8 2 2 9 1 2 11 1 0 1 0 1 0 1 0

Table 6

On the basis of above-mentioned two kinds of restrictive conditions, if hope further to reduce the scheme quantity of special area configuration, can in restrictive condition, further comprise restriction to the GP slot length, reduce the selection that covers.

For example, on the basis of above-mentioned first kind of restrictive condition, can in restrictive condition, further increase: when adopting weak point CP, the GP slot length can only be 2,5,10 or 13 symbols; When adopting long CP, the GP slot length can only be 2,4,8 or 11 symbols.According to this restrictive condition, when adopting short CP, can obtain the special area configuration shown in table 7 and table 8 respectively with long CP:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 11∶1∶2 Dw∶GP∶Up 1∶2∶11 Dw∶GP∶Up 6∶2∶6 Dw∶GP∶Up 5∶2∶7 The GP slot length Dw Up Dw Up Dw Up Dw Up 2 10 2 1 11 6 6 5 7 5 7 2 3 6 3 6 10 2 2 2 2 2 2 13 1 0 1 0 1 0 1 0

Table 7

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 9∶1∶2 Dw∶GP∶Up 1∶2∶9 Dw∶GP∶Up 5∶2∶5 Dw∶GP∶Up 5∶1∶6

The GP slot length Dw Up Dw Up Dw Up Dw Up 2 8 2 1 9 5 5 5 5 4 6 2 3 5 3 5 8 2 2 2 2 2 2 11 1 0 1 0 1 0 1 0

Table 8

Again for example, on the basis of above-mentioned second kind of restrictive condition, can in restrictive condition, further increase: when adopting weak point CP, the GP slot length can only be 2,3,4,5 or 10 symbols; When adopting long CP, the GP slot length can only be 1,2,3,4 or 8 symbol.According to this restrictive condition, when adopting short CP, can obtain the special area configuration shown in table 9 and table 10 respectively with long CP:

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 11∶1∶2 Dw∶GP∶Up 1∶2∶11 Dw∶GP∶Up 6∶2∶6 Dw∶GP∶Up 5∶2∶7 The GP slot length Dw Up Dw Up Dw Up Dw Up 2 10 2 1 11 6 6 5 7 3 9 2 5 6 4 7 4 8 2 4 6 3 7 5 7 2 3 6 2 7 10 2 2

Table 9

TD-SCDMA system descending ascending time slot ratio 4∶3 6∶1,3∶4 5∶2 2∶5 Dw∶GP∶Up 9∶1∶2 Dw∶GP∶Up 1∶2∶9 Dw∶GP∶Up 5∶2∶5 Dw∶GP∶Up 5∶1∶6 The GP slot length Dw Up Dw Up Dw Up Dw Up 1 9 2 5 6 2 8 2 1 9 5 5 4 6 3 7 2 4 5 3 6 4 6 2 3 5 2 6 8 2 2 2 0

Table 10

Step 1302 for all special areas that obtain in the step 1301 are configured into line number, and is preserved special area configuration and the corresponding relation of numbering in base station and subscriber equipment.

Through the restrictive condition that increases in the last step, the kind of all special area configurations that obtain in the present embodiment is simplified.In this step; All special areas are configured into line number; Thereby can dispose through the corresponding special area of number-mark, and not need to identify the special area configuration, simplify identification means like the mode of the starting point of utilizing the GP time slot among the embodiment one and terminal point or starting point and length.

After correspondence is provided with numbering, in subscriber equipment and base station, preserve special area configuration and the corresponding relation of numbering respectively.

Step 1303, base station are confirmed the current one group special area configuration corresponding with the compatibility requirement of TD-SCDMA system according to the corresponding relation of preserving; And, in all special area configurations of confirming, select a kind of according to coverage.

In this step, the base station confirms that according to the corresponding relation of preserving current compatibility requires one group of corresponding special area configuration.Particularly, if compatibility is not required, then confirm not have to satisfy the special area allocation plan of pre-set limit condition under the compatible prerequisite that requires; If compatibility is had requirement, then confirm under the prerequisite of the uplink and downlink timeslot ratio relation that satisfies compatible TD-SCDMA system, to satisfy all special area allocation plans of pre-set limit condition.For example, when the descending ascending time slot ratio that requires compatible TD-SCDMA system was 4: 3, all the special area configurations in 4: 3 respective column in table 3 were all special area configurations of satisfying restrictive condition.

Next; According to coverage; Confirm the minimum requirement of GP slot length, concrete mode is identical with mode among the embodiment one, and the minimum according to this GP slot length requires selection a kind of in all special areas configurations of satisfying restrictive condition of just having confirmed; If have a plurality of configurations all to satisfy the minimum requirement of this GP slot length, then can further select according to the business need of up-downgoing transfer of data.For example; When adopting weak point CP; The requirement coverage is 25km, and the requirement of the minimum of GP slot length is 3 symbols so, the special area allocation plan when the GP slot length is more than or equal to 3 symbol lengths so; Be specially in the table 3 the 6th row and the 1st be listed as the pairing special area allocation plan of the 3rd row in the 14th row, all can be selected to the allocation plan that adopt this base station.

Step 1304, the base station sends to subscriber equipment with the corresponding numbering of selecting in the step 1303 of special area configuration.

In this step, the base station with the mode that the special area configuration of selecting sends to subscriber equipment is: the corresponding numbering of this special area configuration is sent to subscriber equipment.

Step 1305, subscriber equipment receive numbering and confirm the special area configuration, and transfer of data is carried out in structure radio half frame and base station.

In this step; Subscriber equipment receives the numbering that send the base station; And, confirm to receive the pairing special area configuration of numbering according to the corresponding relation of the special area configuration of self preserving with numbering, utilize this special area arrangement radio half frame and base station to carry out transfer of data.

So far, the method flow in the embodiment of the invention two finishes.

In embodiment two, simplify, the identification means employing of special area configuration is provided with the mode of reference numeral based on preset restrictive condition.Particularly, in embodiment two, numbering is set, in fact, also can adopts following mode to identify to all special area configuration unifications of satisfying restrictive condition:

Subclass is carried out in all special area configurations to be cut apart; For different subclass are numbered, and for the different special area configurations in the subclass are provided with the configuration numbering, then; When the configuration of the arbitrary special area of sign, numbering and corresponding configuration numbering through this special area configuration place subclass identify.In subscriber equipment and base station, preserve the subset information and configuration number information of above-mentioned special area configuration; Behind the special area allocation plan of confirming to adopt when the base station; The numbering of this special area allocation plan place subclass is sent to subscriber equipment with corresponding configuration numbering; Subscriber equipment is confirmed subclass according to the subclass numbering that receives, and in this subclass of self preserving, confirms corresponding special area allocation plan according to the configuration numbering that receives.

In said process; Can require according to compatibility to carry out when carrying out subset division to the TD-SCDMA system; Can compatibility be required the identical sub-set that is divided into, also can be with the sub-set that is divided into of a plurality of different compatible requirements, for example; Shown in table 3 and table 4; When the descending of TD-SCDM system and ascending time slot ratio are 6: 1 during with 3: 4, the plan of establishment of slot length is identical, at this moment can require the plan of establishment of time slot corresponding length to be divided in sub-set inside these two compatibility.

In addition, when the current slot length plan of establishment of adopting of notifying user equipment, the mode that sends to subscriber equipment is numbered with subclass numbering and the configuration in the subclass in the aforementioned base station that should be mentioned that.In fact, subscriber equipment possibly known the subclass numbering through other modes, and in this case, the base station can only send to subscriber equipment with the numbering of the configuration in the subclass and get final product.For example; The base station of LTE TDD system must with native system descending with ascending time slot ratio notifying user equipment; Visible like Fig. 9, when adopting weak point CP, if the descending and ascending time slot ratio of LTE TDD system is 3: 1; Descending and the ascending time slot ratio of TD-SCDMA system that then can be compatible is 5: 2; Simultaneously should compatibility require (compatible TD-SCDMA system descending with ascending time slot ratio be 5: 2) unique corresponding sub-set, subscriber equipment has in fact obtained the descending and ascending time slot ratio of LTE TDD system so, has confirmed the subclass numbering with regard to corresponding.At this moment, do not need notifying user equipment subclass numbering, only need notice configuration numbering to get final product.When the base station selected slot length plan of establishment, when compatibility is not required, the scheme of compatible TD-SCDMA system at first.

The invention described above embodiment one all can implement in system shown in Figure 6 with the method flow among the embodiment two.

More than being merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.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 (20)

1. the data transmission method of a tdd systems is characterized in that, this method comprises:
In advance based on compatible requirement arbitrary and Time Division-Synchronous Code Division Multiple Access access (TD-SCDMA) system; Correspondence is provided with one group and comprises with OFDM (OFDM) symbol lengths being the protection special area configuration of (GP) time slot, down-going synchronous (DwPTS) time slot and uplink synchronous (UpPTS) slot length at interval of unit, and in the base station, preserves each said compatible requirement and said one group of special area configured corresponding relation;
The current one group special area configuration corresponding with the compatibility requirement of TD-SCDMA system confirmed based on the corresponding relation of preserving in the base station; And, in said one group of special area configuration, select a kind ofly based on coverage, and the special area configuration of selecting sent to subscriber equipment;
Transfer of data is carried out according to the special area arrangement radio half frame of selecting in subscriber equipment and base station; Wherein, said radio half frame comprises that 8 length are the conventional time slot of 0.5ms, and per two conventional time slots are composed of a sub-frame.
2. method according to claim 1; It is characterized in that; Said according to the arbitrary and compatible requirement TD-SCDMA system, correspondence is provided with one group of special area and is configured to: according to the arbitrary and compatible requirement TD-SCDMA system, correspondence is provided with all possible special area configuration.
3. method according to claim 2 is characterized in that, said special area configuration with selection sends to subscriber equipment and is:
The starting point and the terminal point of GP time slot are sent to subscriber equipment in the side-play amount of special area; Said side-play amount is a unit with the OFDM symbol;
Perhaps, the starting point with the GP time slot sends to subscriber equipment at the side-play amount and the GP slot length of special area; Said side-play amount is a unit with the OFDM symbol.
4. method according to claim 1; It is characterized in that; Said according to the arbitrary and compatible requirement TD-SCDMA system, correspondence is provided with one group of special area and is configured to: according to the arbitrary and compatible requirement TD-SCDMA system, all special areas configurations of satisfying the pre-set limit condition are set.
5. method according to claim 4 is characterized in that, said restrictive condition is the span of the UpPTS slot length that is provided with in advance.
6. method according to claim 5 is characterized in that, the span of said UpPTS slot length is: when coded identification adopted weak point CP, the length of UpPTS time slot was 0 or 2 or 6 or 7 or 11 OFDM symbol; When coded identification adopted long CP, the length of UpPTS time slot was 0 or 2 or 5 or 6 or 9 OFDM symbol.
7. method according to claim 6 is characterized in that, when coded identification adopted weak point CP, said all special areas that satisfy the pre-set limit condition were configured to:
When coded identification adopted long CP, said all special areas that satisfy the pre-set limit condition were configured to:
Wherein, the length of DwPTS time slot, GP time slot and UpPTS time slot is unit with the OFDM symbol all.
8. method according to claim 5 is characterized in that, said pre-set limit condition further comprises the restriction to the GP slot length.
9. method according to claim 8 is characterized in that, when coded identification adopted short CP, being restricted to of said GP slot length: the GP slot length was 2 or 5 or 10 or 13 OFDM symbols; Said all special areas that satisfy the pre-set limit condition are configured to:
When coded identification adopted long CP, being restricted to of said GP slot length: the GP slot length was 2 or 4 or 8 or 11 OFDM symbols; Said all special areas that satisfy the pre-set limit condition are configured to:
Wherein, the length of DwPTS time slot, GP time slot and UpPTS time slot is unit with the OFDM symbol all.
10. method according to claim 4 is characterized in that, said restrictive condition is: for the descending ascending time slot ratio of every kind of different TD-SCDM system, the UpPTS slot length is a regular length;
Said all special areas that satisfy the pre-set limit condition that are provided with are configured to: for the descending ascending time slot ratio of every kind of different TD-SCDM system,
In the duration scope of said special area; It is said regular length that the UpPTS slot length is set, and the GwPTS slot length begins from maximum occurrences, is that unit reduces successively with the OFDM symbol lengths; The GP slot length begins from minimum value, is that unit increases successively with the OFDM symbol lengths.
11. method according to claim 10 is characterized in that, when coded identification adopted weak point CP, said all special areas that satisfy the pre-set limit condition were configured to:
When coded identification adopted long CP, said all special areas that satisfy the pre-set limit condition were configured to:
Wherein, the length of DwPTS time slot, GP time slot and UpPTS time slot all is unit with the symbol.
12. method according to claim 11 is characterized in that, said pre-set limit condition further comprises the restriction to the GP slot length.
13. method according to claim 12 is characterized in that, when coded identification adopted short CP, being restricted to of said GP slot length: the GP slot length was 2 or 3 or 4 or 5 or 10 OFDM symbols; Said all special areas that satisfy the pre-set limit condition are configured to:
When coded identification adopted long CP, being restricted to of said GP slot length: the GP slot length was 1 or 2 or 3 or 4 or 8 OFDM symbol; Said all special areas that satisfy the pre-set limit condition are configured to:
Wherein, the length of DwPTS time slot, GP time slot and UpPTS time slot is unit with the OFDM symbol all.
14. method according to claim 4; It is characterized in that; All special areas that satisfy the pre-set limit condition for all compatible requirement correspondences are configured into line number in advance, and in base station and subscriber equipment, preserve special area configuration and the corresponding relation of numbering;
Said base station sends to subscriber equipment with the special area configuration of selecting: the base station sends to subscriber equipment with the corresponding numbering of selecting of special area configuration;
Said subscriber equipment based on the special area arrangement radio half frame of selecting is: subscriber equipment is confirmed its corresponding special area configuration based on the numbering that receives, and based on this special area arrangement radio half frame.
15. method according to claim 4; It is characterized in that; Subset division is carried out in advance that all compatible requirements are corresponding all special areas configurations of satisfying the pre-set limit condition; For different subsets is provided with numbering, and in each sub-set, the configuration numbering is set for all different special area configuration correspondences; In base station and subscriber equipment be that unit preserves all special areas configurations, and preserve in the corresponding numbering of subclass and the subclass the corresponding configuration of each special area configuration and number with the subclass.
16. method according to claim 15 is characterized in that, said base station sends to subscriber equipment with the special area configuration of selecting and is: the base station sends to subscriber equipment with the numbering of the special area configuration place subclass of selecting with corresponding configuration numbering.
17. method according to claim 15; It is characterized in that; Said base station sends to subscriber equipment with the special area configuration of selecting: if the numbering of the selected special area configuration of subscriber equipment known base station place subclass, only that the special area configuration of selecting is the corresponding configuration numbering in base station sends to subscriber equipment.
18. according to claim 16 or 17 described methods; It is characterized in that; Said subscriber equipment according to the special area arrangement radio half frame of selecting is: subscriber equipment is confirmed the subclass at special area configuration place according to the subclass numbering; And, in this subclass, confirm corresponding special area configuration, according to this special area arrangement radio half frame according to the configuration numbering that receives.
19. method according to claim 15 is characterized in that, said when carrying out subset division the compatibility of basis and TD-SCDMA system require to carry out.
20. a tdd systems comprises base station and subscriber equipment, it is characterized in that,
Said base station; Insert the descending ascending time slot ratio of (TD-SCDMA) system according to arbitrary Time Division-Synchronous Code Division Multiple Access; Correspondence is provided with one group and comprises with OFDM (OFDM) symbol lengths being the protection special area configuration of (GP) time slot, down-going synchronous (DwPTS) time slot and uplink synchronous (UpPTS) slot length at interval of unit, and in the base station, preserves each said descending ascending time slot ratio and said one group of special area configured corresponding relation; According to the said corresponding relation of preserving, confirm one group of corresponding special area configuration of descending ascending time slot ratio of current TD-SCDMA system; And, in said one group of special area configuration, select a kind ofly according to current coverage range, and the special area configuration of selecting sent to subscriber equipment; Special area arrangement radio half frame according to selecting is carried out transfer of data; Wherein, said radio half frame comprises that 8 length are the conventional time slot of 0.5ms, and per two conventional time slots are composed of a sub-frame;
Said subscriber equipment is used to receive the special area configuration of sending the base station, and carries out transfer of data according to this special area arrangement radio half frame.
CN2007101771143A 2007-11-09 2007-11-09 TDD system and its data transmission method CN101431363B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106717064A (en) * 2015-04-03 2017-05-24 华为技术有限公司 Data transmission method, device and system of time division duplex wireless data transmission system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103581093B (en) * 2012-08-10 2018-03-16 电信科学技术研究院 Signal sending and receiving method, equipment and system for discovering
WO2014127532A1 (en) * 2013-02-22 2014-08-28 华为技术有限公司 Sub-frame generating method and equipment, sub-frame determining method and user equipment
CN104685945B (en) * 2013-09-30 2019-02-01 华为技术有限公司 Transmit timing method and device
WO2017113425A1 (en) 2015-12-31 2017-07-06 华为技术有限公司 Data transmission method and user equipment
CN109586874A (en) * 2017-09-29 2019-04-05 中国移动通信有限公司研究院 A kind of configuration method of special subframe, detection method, base station and terminal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995032558A2 (en) * 1994-05-24 1995-11-30 Nokia Telecommunications Oy A method for improving connection quality in a cellular radio system, and a base station
WO2002011317A1 (en) * 2000-06-20 2002-02-07 Linkair Communications, Inc. A tdd framing method for physical layer of a wireless system
CN1913418A (en) * 2005-08-08 2007-02-14 大唐移动通信设备有限公司 Method for supporting changable cover by time division duplex system
CN1917420A (en) * 2005-08-17 2007-02-21 大唐移动通信设备有限公司 Transmission method of time division duplexing system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995032558A2 (en) * 1994-05-24 1995-11-30 Nokia Telecommunications Oy A method for improving connection quality in a cellular radio system, and a base station
WO2002011317A1 (en) * 2000-06-20 2002-02-07 Linkair Communications, Inc. A tdd framing method for physical layer of a wireless system
CN1913418A (en) * 2005-08-08 2007-02-14 大唐移动通信设备有限公司 Method for supporting changable cover by time division duplex system
CN1917420A (en) * 2005-08-17 2007-02-21 大唐移动通信设备有限公司 Transmission method of time division duplexing system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106717064A (en) * 2015-04-03 2017-05-24 华为技术有限公司 Data transmission method, device and system of time division duplex wireless data transmission system
CN106717064B (en) * 2015-04-03 2020-02-14 华为技术有限公司 Data transmission method, device and system of time division duplex wireless data transmission system

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