CN101425845A - Transmission method and apparatus for time division duplexing system - Google Patents
Transmission method and apparatus for time division duplexing system Download PDFInfo
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- CN101425845A CN101425845A CNA200710176799XA CN200710176799A CN101425845A CN 101425845 A CN101425845 A CN 101425845A CN A200710176799X A CNA200710176799X A CN A200710176799XA CN 200710176799 A CN200710176799 A CN 200710176799A CN 101425845 A CN101425845 A CN 101425845A
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Abstract
The invention discloses a transmission method of a time division duplex system, which comprises the following steps: a radio frame structure used for transaction transmission and configured on a network side comprises two 5ms half frames, each of which is composed of eight 0.5ms transaction time slot zones and one 1ms special time slot zone, and two continuous transaction time slots are one subframe of which the length is 1ms; the special time slot zone comprises three special time slots, i.e. a downlink pilot frequency time slot, a protection interval and an uplink pilot frequency time slot; the lengths of the downlink pilot frequency time slot, the protection interval and the uplink pilot time slot in the special time slot zones are confirmed according to the requirements of a coverage range so as to confirm the radio frame structure used for the transaction transmission; and the network side and the terminal carry out the transaction transmission by using the radio frame. The invention reconfigures the frame structure to flexibly configure the downlink pilot frequency time slot, the protection time interval or the uplink pilot frequency time slot in the special time slot zones according to the requirements of the coverage so as to flexibly support different coverage ranges.
Description
Technical field
The present invention relates to mobile communication technology, be specifically related to a kind of transmission method and device of tdd systems.
Background technology
At present, 3-G (Generation Three mobile communication system) standardization body (3GPP) has started Long Term Evolution (LTE) research project of 3G wireless interface technology.According to progress, the LTE system determines to support 2 kinds of wireless frame structures:
A, first kind radio frames (hereinafter referred Type1), be applicable to frequency division duplex system (FrequencyDivision Duplex, FDD) and time division duplex (Time Division Duplex, TDD) system, its structure as shown in Figure 1, wherein:
The frame length of Type1 is 10ms, is made up of 20 time slots, and every slot length is 0.5ms, is labeled as #0～#19 among Fig. 1.Per two continuous time slot are defined as a subframe, have 10 subframes, that is: subframe i is made up of time slot 2i and 2i+1, wherein i=0,1,2......9.
When Type1 was applied to the FDD system, because the up-downgoing of frequency division duplex system separates on frequency domain, therefore every 10ms was in the time, and the provisional capital has 10 subframes to use up and down.
When Type1 was applied to the TDD system, every 10ms was in the time, and up-downgoing has 10 subframes and can use, and each subframe or be used for uply or is used for descendingly, and wherein subframe 0 and subframe 5 always are assigned as downlink transfer.
The LTE system is based on OFDM (Orthogonal Frequency Division Multiplexing, OFDM) technology, its subcarrier spacing is set at 15 KHz, corresponding OFDM symbol lengths is 66.67us, for Type1, its each slot length is 0.5ms, when supporting little coverage, use the short Cyclic Prefix (CP) of length as 4.7us, every time slot comprises 7 OFDM symbols; And when supporting big the covering, using the long CP of length as 16.67us, every time slot comprises 6 OFDM symbols.As calculated as can be known, the CP expense of Type1 under short CP and long CP configuration is about 6.7% and 20%.
B, the second class radio frames (hereinafter referred Type2) are only applicable to the TDD system, its structure as shown in Figure 2, wherein:
The frame length of Type2 is 10ms, and every frame is divided into the field of 2 5ms.(be labeled as #0～#6) and 3 special time slots among Fig. 2 forms each field by 7 business time-slots.As shown in Figure 2, described 3 special time slots are respectively: descending pilot frequency time slot (DwPTS), protection at interval (Guard Period, GP) and uplink pilot time slot (UpPTS).
Each business time-slot is defined as a subframe, and wherein subframe # 0 and descending pilot frequency time slot always are used for downlink transfer, and subframe # 1 and uplink pilot time slot always are used for uplink.
In the frame structure of Type2, each business time-slot length is 675us, and when adopting short CP to dispose, each business time-slot is made up of the OFDM symbol of 9 short CP configurations, and its short-and-medium CP length is 8.33us, and the length of OFDM symbol is 66.67us.When adopting long CP to dispose, each business time-slot is made up of the OFDM symbol of 8 long CP configurations, and wherein long CP length is 17.71us, and the OFDM symbol lengths still is 66.67us.Concrete adopt the still long CP of short CP by application scenarios specifically need decision, adopt short CP configuration during for example little coverings, cover greatly or when carrying out many cell broadcaste services the long CP of employing dispose.
By the frame structure of Type1 and Type2 as can be seen, since the frame structure difference, the expense of CP among the Type2, and the expense under the especially short CP configuring condition is bigger, has reached 8.33/66.67=12.49%.In ofdm system, the length of CP has determined the ability of anti-multipath of ofdm system, and long CP helps overcoming multipath to be disturbed, but overhead also can be bigger, and this bigger expense has influenced the peak rate and the efficiency of transmission of system, thereby causes data transmission capabilities to descend.For channel circumstance in actual applications, adopt CP about 5us to overcome the influence that the multidiameter expansion causes and can meet the demands.Therefore, the setting of existing C P length can reduce efficiency of transmission among the Type2.
For the TDD system, for fear of the interference between uplink and downlink timeslot, GP need be set at descending time slot to the switching point of up time slot, the length of this GP equals the time that distance experienced of electromagnetic wave propagation radius of society twice, i.e. T
GP=2*R
Cell/ C, wherein R
CellThe expression radius of society, C represents electromagnetic wave propagation velocity (3 * 10 in a vacuum
8Meter per second).
In the prior art, among the Type2 in the special time slot zone length of DwPTS, GP and three special time slots of UpPTS fix, be respectively 83.33us, 50us and 141.66us, wherein, by previously described T
GPComputing formula as can be known the length of GP determined system at following the covering radius that can support of this frame structure configuration.
Current, at the requirement of different coverages, comprise about the method for adjustment of GP:
A, under the situation of radius of society less than 7.5 kms, use existing frame structure, as shown in Figure 3, this moment, the GP duration was 50us, insert at random in the UpPTS time slot and carry out this moment.
B, for radius of society greater than of the medium covering of 7.5 kms less than 30 kms, use frame structure as shown in Figure 4, the GP length of original 50us is not enough among this moment Type2, therefore GP and UpPTS is merged into new GP, time span is 191.66us, according to T
GPWith R
CellRelation can calculate the coverage of about 29 kms of this frame structure support.At this moment, insert at random and can carry out at subframe # 1 or arbitrary ascending time slot thereafter.
C, for the big covering scene of radius of society greater than 30 kms, use frame structure as shown in Figure 5, merge whole subframe # 1 and GP, UpPTS this moment, time span is 866.66us, can support the cell coverage area more than 100 kms.At this moment, insert at random at subframe # 2 or arbitrary ascending time slot thereafter and carry out.
As seen by above-mentioned, in order to support the different coverages of sub-district, the method that prior art adopts lengthening GP to make it to comprise one or more ascending time slots realizes, adopts the methods of above-mentioned three kinds of expansion GP length usually.But, above-mentioned collocation method is to the support underaction of coverage, such as being the sub-district of 40 kms for coverage requirement, its frame structure need adopt scheme C, and scheme C maximum can be supported the coverage of 120 kms, therefore a big chunk among this GP just has been wasted when practical application, and then has influenced the raising of system transmissions efficient.
Therefore, prior art can't be supported the requirement of various coverages neatly.
Summary of the invention
The embodiment of the invention provides a kind of transmission method of tdd systems, can support the requirement of various coverages flexibly.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of transmission method of tdd systems, this transmission method comprises:
The wireless frame structure that network side is configured into industry affair transmission use is: comprise the field of 2 5ms, each field is made of the business time-slot of 8 0.5ms and the special time slot zone of 1 1ms, and two continuous business time-slots are a subframe, and subframe lengths is 1ms; Comprise descending pilot frequency time slot, protection interval and 3 special time slots of uplink pilot time slot in the special time slot zone;
According to the requirement of coverage, determine the length of descending pilot frequency time slot in the special time slot zone, protection interval, uplink pilot time slot, determine the wireless frame structure that professional transmission is used;
Network side and terminal adopt described radio frames to carry out the business transmission.
A kind of transmitting device of tdd systems, this transmitting device comprises:
Be arranged on network side frame structure configuration module, frame structure notification module and the professional transceiver module of network side; Be arranged on terminals frames structural arrangements module, frame structure notice receiver module and the terminal traffic transceiver module of terminal;
Network side frame structure configuration module, the predetermined information of storage frame structure, and the requirement of coverage is determined descending pilot frequency time slot in the special time slot zone, protected at interval and the length of uplink pilot time slot according to predetermined information and system, determine the wireless frame structure information that professional transmission is used, and frame structure information is sent to frame structure notification module and professional transceiver module;
Described predetermined information is: system is carried out the professional field that the radio frames of using is configured to comprise 2 5ms that transmits, each field is made of the business time-slot of 8 0.5ms and the special time slot zone of 1 1ms, two continuous business time-slots are a subframe, and subframe lengths is 1ms; Comprise descending pilot frequency time slot, protection interval and 3 special time slots of uplink pilot time slot in the special time slot zone;
Described frame structure notification module will comprise descending pilot frequency time slot in the special time slot zone of configuration, protection at interval and the frame structure information of the length of uplink pilot time slot notice end side frame structure notice receiver module;
The frame structure notice receiver module of described end side, the frame structure information that received frame configuration notification module sends sends to terminals frames structural arrangements module with this information;
Terminals frames structural arrangements module, the predetermined information of storage frame structure, that stores in the frame structure configuration module of described predetermined information and network side is identical; And the frame structure information that sends according to this predetermined information and frame structure notice receiver module, self frame structure of end side is configured, the frame structure information of self configuration is sent to the terminal traffic transceiver module;
The described professional transceiver module that is arranged on network side uses the frame structure of configuration to carry out the business transmission with the terminal traffic transceiver module that is arranged on end side.
As seen from the above technical solutions; the present invention is by reconfiguring frame structure; make the descending pilot frequency time slot that comprises in the special time slot zone, protection at interval or uplink pilot time slot can be by the requirement of system to coverage; realize flexible configuration, thereby realized the different coverages of flexible support.
Description of drawings
Fig. 1 is the schematic diagram of Type1 frame structure in the prior art.
Fig. 2 is the schematic diagram of Type2 frame structure in the prior art.
Fig. 3 is the schematic diagram of LTE TDD system frame structure under little coverage condition in the prior art.
Fig. 4 is the schematic diagram of LTE TDD system frame structure under middle coverage condition in the prior art.
Fig. 5 is the schematic diagram of LTE TDD system frame structure under big coverage condition in the prior art.
Fig. 6 is the schematic flow sheet of the transmission method of TDD system in the embodiment of the invention.
Fig. 7 is the schematic diagram of the frame structure that disposes in the transmission method in the embodiment of the invention.
Fig. 8 is that a kind of structure of special time slot in the embodiment of the invention is formed schematic diagram.
Fig. 9 is the composition structural representation of the transmitting device of TDD system in the embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
The flow process of the transmission method of a kind of TDD system that the embodiment of the invention proposes as shown in Figure 6, comprising:
Step 601: network side is configured into industry and is engaged in transmitting the wireless frame structure that uses.
Described wireless frame structure is: comprise the field of 2 5ms, each field is made of the business time-slot of 8 0.5ms and the special time slot zone of 1 1ms, and two continuous business time-slots are a subframe, and subframe lengths is 1ms; Comprise DwPTS, a GP and UpPTS3 special time slot in the special time slot zone, as shown in Figure 7.
Wherein, the length of 3 special time slots can be by the high-level signaling flexible configuration, and is constant but the total length in the special time slot zone that the three constitutes remains 1ms.At this moment, comprise 4 subframes in each field, according to each business time-slot of parameter configuration as shown in table 1, this parameter is identical with the parameter configuration of the Type1 that is used for the FDD system at present.
Table 1
Difference according to the configuration mode of a radio frames can be divided into following two kinds of situations:
A, be unit with the field of 5ms, the uplink and downlink timeslot configuration mode in each field is identical.
At this moment, a pair of switching point of configuration in each field, comprise one come downwards to up switching point (Downlink to Uplink Switch Point, DUSP) and one go upward to descending switching point (Uplinkto Downlink Switch Point, UDSP).DUSP is positioned at GP, and UDSP can be configured between special time slot zone and the subframe # 1, or between subframe # 1 and subframe # 2, or between subframe # 2 and subframe # 3, or be positioned at after the subframe # 3, the embodiment of the invention does not limit, and can be configured according to the ratio that up-downgoing requires.
B, be unit with the radio frames of 10ms, the configuration mode of up-downgoing is separate in the field of two 5ms in the radio frames, both can be the same or different, and the radio frames configuration of this moment is further divided into two kinds of situations:
Two pairs of switching points of configuration in b1, the radio frames, i.e. UDSP position in the configuration a pair of switching point (DUSP and UDSP) in the field of each 5ms, this moment two fields is separate, must not keep corresponding identical.
B2, the special time slot zone is set in the field of a 5ms comprises descending pilot frequency time slot, protection at interval and uplink pilot time slot, be provided with that the special time slot zone only comprises descending pilot frequency time slot in the field of another 5ms; Because descending synchronous signal channel sends in the DwPTS time slot, so the transmission cycle of downlink synchronous signal is 5ms.
Described DUSP is configured in the protection at interval; When the field that comprises DwPTS, GP and UpPTS when preceding, UDSP is configured in after the UpPTS, the boundary of subframe arbitrarily before the special time slot zone of a back 5ms field; When the field that comprises DwPTS, GP and UpPTS in when back, UDSP is configured in after the UpPTS boundary of subframe arbitrarily.
Step 602: network side disposes the length of special time slot in the special time slot zone according to the requirement of different coverages, and concrete grammar is respectively:
1) Fig. 8 shows DwPTS, GP in the special time slot and the concrete composition structure of UpPTS: the length that DwPTS is set is the OFDM symbol more than 1 or 1, comprise primary synchronization channel P-SCH in the descending pilot frequency time slot, and described P-SCH sends at first OFDM symbol of DwPTS, and the shared frequency domain of described P-SCH is the centre 1.25 megahertz bandwidth of the total frequency band of system.
Need to prove, when system need be with TD SDMA (TD-SCDMA) coexistence of systems, because two systems all are the TDD systems, when the network coverage of two systems occurs when overlapping, because uplink and downlink timeslot difference in two employed frame structures of system, the phase mutual interference may occur, even cause when serious two systems all can't operate as normal.
Therefore, when system does not need with TD SDMA TD-SCDMA coexistence of systems, the length of described descending pilot frequency time slot is configured to comprise at least 2 OFDM symbols, comprise primary synchronization channel in the descending pilot frequency time slot, described primary synchronization channel sends at first OFDM symbol of descending pilot frequency time slot.
And when system need be with the TD-SCDMA coexistence of systems, the length of described descending pilot frequency time slot is configured to comprise at least 1 OFDM symbol, comprise primary synchronization channel in the descending pilot frequency time slot, described primary synchronization channel sends at first OFDM symbol of descending pilot frequency time slot.
Time-frequency domain resources among the DwPTS except that the running time-frequency resource that P-SCH takies is used for sending descending control signaling and/or downlink data and/or downlink reference signal.
Send at last OFDM symbol of subframe # 0 from synchronizing signal S-SCH, i.e. an OFDM symbol before the DwPTS, the shared frequency domain of described S-SCH is identical with P-SCH, also is the centre 1.25 megahertz bandwidth of the total frequency band of system.
By table 1 in the preamble as can be known, when adopting short CP to dispose, comprise 14 OFDM symbols in the special time slot of 1ms, and when adopting long CP to dispose, comprise 12 OFDM symbols in the special time slot of 1ms.
At this moment, further according to the requirement of coverage, the length that described GP is set is N OFDM symbol, and when the length of GP was N OFDM symbol, corresponding coverage was the 10*N km, when adopting short CP to dispose, 0≤N≤13, when adopting long CP to dispose, 0≤N≤11, when N got maximum, UpPTS was the length of 0 OFDM symbol.
2) configuration mode of the Random Access Channel of system (PRACH) as shown in Figure 8, PRACH is configured among the UpPTS sends, the length that be provided with UpPTS this moment is the OFDM symbol more than 2, and the position of PRACH in UpPTS can be preceding two or latter two OFDM symbol among the UpPTS;
Time-frequency domain resources among the UpPTS except that the running time-frequency resource that PRACH takies can be used for sending upstream control signaling and/or upstream data and/or uplink reference signals and/or uplink detection signal.
Described PRACH occupies 6 Resource Block on frequency domain, concrete frequency domain position is preestablished by system, and can change in time.
Step 603: network side and terminal adopt the frame structure of configuration to carry out the business transmission.
Need to prove, further comprise step 604 after the step 601: the result that will dispose the wireless frame structure that transport service is used, store network side and terminal in advance into.Concrete grammar is same as the prior art, so will not give unnecessary details.
Simultaneously, further comprise step 605 after the step 602: the descending pilot frequency time slot, protection that network side will comprise configuration at interval and the frame structure information of the length of uplink pilot time slot send to terminal;
Terminal is carried out self frame structure configuration according to the length of the result of the frame structure configuration of storage in advance and the descending pilot frequency time slot that receives, protection interval and uplink pilot time slot.Concrete grammar is same as the prior art, so locate to repeat no more.
By as seen above-mentioned, transmission method in the embodiment of the invention, shortened the length of CP, the short-and-medium CP length of prior art is 8.33us, long CP length is 17.71us, in the frame structure of the transmission method of the employing embodiment of the invention, short CP length is about 5us, and long CP length is 16.67us, solved the long problem of CP configured length in system's prior art, simultaneously, the non-resource part that earmarks can also be further used for carrying out various signalings in the described frame structure, the transmission of data, can be used for sending descending control signaling as the part except that P-SCH among the DwPTS, downlink data, therefore downlink reference signal or described three's combination in any can improve resource utilization, has improved the efficiency of transmission of system.
Simultaneously, it is 1ms that this transmission method has disposed the subframe lengths in the frame structure, comprise two continuous business time-slots and in pairs configuration use, both reduced the complexity of scheduling of resource etc., can realize the frequency hopping transmission between time slot again easily; And, compare the subframe of original 0.675ms, after increasing, length can solve the original up covering problem at first that may cause because subframe lengths is short.
Further, described frame structure and Type1 have consistency preferably, the parameter of its subframe lengths, slot length and OFDM symbol is all identical with Type1, feasible device end based on FDD/TDD dual-mode of operation pattern is easier to realize, helps based on the mutual coexistence between the equipment of FDD and TDD standard.
In addition, the embodiment of the invention also provides a kind of transmitting device of the TDD system corresponding with said method, and Fig. 9 is the structural representation of transmitting device preferred embodiment of the present invention, comprising:
Be arranged on network side frame structure configuration module 910, frame structure notification module 920 and the professional transceiver module 930 of network side;
Be arranged on terminals frames structural arrangements module 940, frame structure notice receiver module 950 and the terminal traffic transceiver module 960 of terminal.
Wherein, network side frame structure configuration module 910; the predetermined information of storage frame structure; and the requirement of coverage is determined descending pilot frequency time slot in the special time slot zone, protected at interval and the length of uplink pilot time slot according to predetermined information and system; determine the wireless frame structure information that professional transmission is used, and frame structure information is sent to frame structure notification module 920 and professional transceiver module 930.
Described predetermined information is: system is carried out the professional field that the radio frames of using is configured to comprise 2 5ms that transmits, each field is made of the business time-slot of 8 0.5ms and the special time slot zone of 1 1ms, two continuous business time-slots are a subframe, and subframe lengths is 1ms; Comprise descending pilot frequency time slot, protection interval and 3 special time slots of uplink pilot time slot in the special time slot zone.
Described frame structure notification module 920 will comprise descending pilot frequency time slot in the special time slot zone of configuration, protection at interval and the frame structure information of the length of uplink pilot time slot notice end side frame structure notice receiver module 950.
The frame structure notice receiver module 950 of described end side, the frame structure information that received frame configuration notification module 920 sends sends to terminals frames structural arrangements module 940 with this information.
Terminals frames structural arrangements module 940, the predetermined information of storage frame structure, storage is identical in the frame structure configuration module 910 of described predetermined information and network side; And the frame structure information that sends according to this predetermined information and frame structure notice receiver module 950, self frame structure of end side is configured, the frame structure information of self configuration is sent to terminal traffic transceiver module 960.
The described professional transceiver module 930 that is arranged on network side uses the frame structure of configuration to carry out the business transmission with the terminal traffic transceiver module 960 that is arranged on end side.
In the present embodiment, the frame structure configuration module 910 that is arranged on network side comprises: frame structure predetermined information memory cell 911, special time slot dispensing unit 912 and frame structure determining unit 913;
The terminals frames structural arrangements module 940 that is arranged on end side comprises: frame structure predetermined information memory cell 941 and terminals frames structure determining unit 942.
Be arranged on the frame structure predetermined information memory cell 911 of network side, the predetermined information of storage frame structure, and this predetermined information offered special time slot dispensing unit 912.
Special time slot dispensing unit 912 is determined the structure in special time slot zone to the requirement of coverage and wherein descending pilot frequency time slot, protection be at interval and the length of uplink pilot time slot according to described predetermined information and system.
Frame structure determining unit 913; according to the structure in special time slot zone with wherein descending pilot frequency time slot, protection be at interval and the length of uplink pilot time slot; determine the wireless frame structure information that professional transmission is used, send to frame structure notification module 920 and professional transceiver module 930.
Be arranged on the terminals frames structure predetermined information memory cell 941 of end side, the predetermined information of storage frame structure, and this predetermined information offered terminals frames structure determining unit 942.
Terminals frames structure determining unit 942, frame structure information according to described predetermined information and 950 transmissions of frame structure notice receiver module, self frame structure to terminal is configured, determine the frame structure information that terminal is used, the frame structure information that terminal self is disposed sends to terminal traffic transceiver module 960.
This shows that the transmission method and the device of this TDD system of the embodiment of the invention have been realized the different coverages of flexible support, have improved system transmissions efficient.
Understand easily, the above is preferred embodiment of the present invention only, is not to be used to limit spirit of the present invention and protection range, and equivalent variations that any those of ordinary skill in the art made or replacement all should be considered as being encompassed within protection scope of the present invention.
Claims (15)
1, a kind of transmission method of tdd systems is characterized in that, this transmission method comprises:
The wireless frame structure that network side is configured into industry affair transmission use is: comprise the field of 2 5ms, each field is made of the business time-slot of 8 0.5ms and the special time slot zone of 1 1ms, and two continuous business time-slots are a subframe, and subframe lengths is 1ms; Comprise descending pilot frequency time slot, protection interval and 3 special time slots of uplink pilot time slot in the special time slot zone;
According to the requirement of coverage, determine the length of descending pilot frequency time slot in the special time slot zone, protection interval, uplink pilot time slot, determine the wireless frame structure that professional transmission is used;
Network side and terminal adopt described radio frames to carry out the business transmission.
2, transmission method according to claim 1, it is characterized in that, the a pair of switching point of configuration in the field of described 5ms, two business time-slots of every subframe use in pairs, and described a pair of switching point comprises that one comes downwards to up switching point DUSP and one and goes upward to descending switching point UDSP;
Described DUSP is positioned at protection at interval, and UDSP is configured in the boundary of any subframe except that subframe #0.
3, transmission method according to claim 1 is characterized in that, disposes a pair of switching point in the field of each 5ms in described radio frames respectively, and two business time-slots of every subframe use in pairs, and described a pair of switching point comprises DUSP and UDSP;
Described DUSP is configured in respectively in the protection at interval of field separately, and UDSP is configured in the boundary of any subframe except that subframe #0 in the field separately, and the position of described two UDSP is separate configurations separately.
4, transmission method according to claim 1 is characterized in that, a pair of switching point of configuration in described radio frames, and two business time-slots of every subframe use in pairs, and described switching point comprises DUSP and UDSP;
The special time slot zone is set in the field of a 5ms comprises descending pilot frequency time slot, protection at interval and uplink pilot time slot, be provided with that the special time slot zone only comprises descending pilot frequency time slot in the field of another 5ms; Described DUSP is configured in the protection at interval;
When comprise descending pilot frequency time slot, protection at interval and the field of uplink pilot time slot when preceding, UDSP is configured in after the uplink pilot time slot, the boundary of subframe arbitrarily before the special time slot zone of a back 5ms field;
When comprising descending pilot frequency time slot, protection at interval and the field of uplink pilot time slot during in the back, UDSP is configured in after the uplink pilot time slot boundary of subframe arbitrarily.
According to claim 2,3 or 4 described transmission methods, it is characterized in that 5, described requirement according to coverage determines that the method for the length of descending pilot frequency time slot in the special time slot zone, protection interval, uplink pilot time slot is:
When system need be with TD SDMA TD-SCDMA coexistence of systems, the length of described descending pilot frequency time slot is configured to comprise at least 1 OFDM symbol, comprise primary synchronization channel in the descending pilot frequency time slot, described primary synchronization channel sends at first OFDM symbol of descending pilot frequency time slot;
In the described descending pilot frequency time slot, the time-frequency domain resources except that the resource that primary synchronization channel takies is used to send control signaling and/or downlink data and/or downlink reference signal.
According to claim 2,3 or 4 described transmission methods, it is characterized in that 6, described requirement according to coverage determines that the method for the length of descending pilot frequency time slot in the special time slot zone, protection interval, uplink pilot time slot is:
When system does not need with the TD-SCDMA coexistence of systems, the length of described descending pilot frequency time slot is configured to comprise at least 2 OFDM symbols, comprise primary synchronization channel in the descending pilot frequency time slot, described primary synchronization channel sends at first OFDM symbol of descending pilot frequency time slot;
In the described descending pilot frequency time slot, the time-frequency domain resources except that the resource that primary synchronization channel takies is used to send control signaling and/or downlink data and/or downlink reference signal.
7, transmission method according to claim 5 is characterized in that, described requirement according to coverage determines that descending pilot frequency time slot in the special time slot zone, protection are at interval, further comprise in the method for the length of uplink pilot time slot:
According to the requirement of coverage, the length that described protection interval is set is N OFDM symbol, when adopting short CP to dispose, and 0≤N≤13, when adopting long CP to dispose, 0≤N≤11, when N got maximum, uplink pilot time slot was the length of 0 OFDM symbol.
8, according to claim 2,3 or 4 described transmission methods, it is characterized in that, be provided with from synchronizing signal last OFDM symbol transmission at subframe #0.
According to claim 2,3 or 4 described transmission methods, it is characterized in that 9, described requirement according to coverage determines that the method for the length of descending pilot frequency time slot in the special time slot zone, protection interval, uplink pilot time slot is:
Physical Random Access Channel is placed in the uplink pilot time slot sends, the length that uplink pilot time slot is set is the OFDM symbol more than 2.
10, transmission method according to claim 9 is characterized in that, Physical Random Access Channel length is 2 OFDM symbols, and the method that described Physical Random Access Channel sends in uplink pilot time slot is:
With initial 2 or last 2 the OFDM symbols transmission of Physical Random Access Channel at uplink pilot time slot.
11, transmission method according to claim 9 is characterized in that,
In the described uplink pilot time slot, the time-frequency domain resources except that Physical Random Access Channel takies resource is used to send upstream control signaling and/or upstream data and/or uplink reference signals and/or uplink detection signal.
12, according to claim 2,3 or 4 described transmission methods, it is characterized in that, described network side is configured into industry and is engaged in transmitting in the wireless frame structure that uses, and further comprises the result of the wireless frame structure configuration that will use transport service, stores network side and terminal in advance into;
Described requirement according to coverage, determine descending pilot frequency time slot in the special time slot zone, protection at interval, the length of uplink pilot time slot, determine further to comprise in the wireless frame structure that professional transmission uses:
The descending pilot frequency time slot, protection that network side will comprise configuration at interval and the frame structure information of the length of uplink pilot time slot send to terminal;
Terminal is carried out self frame structure configuration according to the length of the result of the frame structure configuration of storage in advance and the descending pilot frequency time slot that receives, protection interval and uplink pilot time slot.
13, a kind of transmitting device of tdd systems is characterized in that, this transmitting device comprises:
Be arranged on network side frame structure configuration module, frame structure notification module and the professional transceiver module of network side; Be arranged on terminals frames structural arrangements module, frame structure notice receiver module and the terminal traffic transceiver module of terminal;
Network side frame structure configuration module, the predetermined information of storage frame structure, and the requirement of coverage is determined descending pilot frequency time slot in the special time slot zone, protected at interval and the length of uplink pilot time slot according to predetermined information and system, determine the wireless frame structure information that professional transmission is used, and frame structure information is sent to frame structure notification module and professional transceiver module;
Described predetermined information is: system is carried out the professional field that the radio frames of using is configured to comprise 2 5ms that transmits, each field is made of the business time-slot of 8 0.5ms and the special time slot zone of 1 1ms, two continuous business time-slots are a subframe, and subframe lengths is 1ms; Comprise descending pilot frequency time slot, protection interval and 3 special time slots of uplink pilot time slot in the special time slot zone;
Described frame structure notification module will comprise descending pilot frequency time slot in the special time slot zone of configuration, protection at interval and the frame structure information of the length of uplink pilot time slot notice end side frame structure notice receiver module;
The frame structure notice receiver module of described end side, the frame structure information that received frame configuration notification module sends sends to terminals frames structural arrangements module with this information;
Terminals frames structural arrangements module, the predetermined information of storage frame structure, that stores in the frame structure configuration module of described predetermined information and network side is identical; And the frame structure information that sends according to this predetermined information and frame structure notice receiver module, self frame structure of end side is configured, the frame structure information of self configuration is sent to the terminal traffic transceiver module;
The described professional transceiver module that is arranged on network side uses the frame structure of configuration to carry out the business transmission with the terminal traffic transceiver module that is arranged on end side.
14, transmitting device according to claim 13 is characterized in that, the described frame structure configuration module that is arranged on network side comprises: frame structure predetermined information memory cell, special time slot dispensing unit and frame structure determining unit;
Described frame structure predetermined information memory cell, the predetermined information of storage frame structure, and this predetermined information offered the special time slot dispensing unit;
Described special time slot dispensing unit is determined the structure in special time slot zone to the requirement of coverage and wherein descending pilot frequency time slot, protection be at interval and the length of uplink pilot time slot according to described predetermined information and system;
Described frame structure determining unit, according to the structure in special time slot zone and wherein descending pilot frequency time slot, protection at interval and the length of uplink pilot time slot determine the wireless frame structure information that professional transmission is used, send to frame structure notification module and professional transceiver module.
15, transmitting device according to claim 13 is characterized in that, the described terminals frames structural arrangements module that is arranged on end side comprises: frame structure predetermined information memory cell and terminals frames structure determining unit;
Described terminals frames structure predetermined information memory cell, the predetermined information of storage frame structure, and this predetermined information offered terminals frames structure determining unit;
Described terminals frames structure determining unit, frame structure information according to described predetermined information and the transmission of frame structure notice receiver module, self frame structure to terminal is configured, and determines the frame structure information that terminal is used, and the frame structure information of terminal self configuration is sent to the terminal traffic transceiver module.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710176799XA CN101425845A (en) | 2007-11-02 | 2007-11-02 | Transmission method and apparatus for time division duplexing system |
| US12/740,972 US8472465B2 (en) | 2007-11-02 | 2008-11-03 | Method and an apparatus for determining the radio frame structure of time division duplex system |
| KR1020107012196A KR101110203B1 (en) | 2007-11-02 | 2008-11-03 | A method and an apparatus for determining the radio frame structure of time division duplex system |
| JP2010531402A JP2011502410A (en) | 2007-11-02 | 2008-11-03 | Method and apparatus for determining radio frame structure of time division duplex system |
| EP08857870.3A EP2234292B1 (en) | 2007-11-02 | 2008-11-03 | A method and an apparatus for determining the radio frame structure of time division duplex system |
| PCT/CN2008/001840 WO2009070964A1 (en) | 2007-11-02 | 2008-11-03 | A method and an apparatus for determining the radio frame structure of time division duplex system |
| JP2013046925A JP5542225B2 (en) | 2007-11-02 | 2013-03-08 | Method and apparatus for determining radio frame structure of time division duplex system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710176799XA CN101425845A (en) | 2007-11-02 | 2007-11-02 | Transmission method and apparatus for time division duplexing system |
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| CN101425845A true CN101425845A (en) | 2009-05-06 |
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| CNA200710176799XA Pending CN101425845A (en) | 2007-11-02 | 2007-11-02 | Transmission method and apparatus for time division duplexing system |
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