CN101431362B - Subframe distribution method and apparatus for TDD system - Google Patents
Subframe distribution method and apparatus for TDD system Download PDFInfo
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Abstract
The invention relates to the technical field of mobile communication, in particular to a subframe distribution technology for a time division duplex system. The invention embodiment discloses a method and a device for subframe distribution for the time division duplex system which reduces the time slot proportion regulation granularity and strengthens the flexibility satisfying different business requirements. The method for the subframe distribution for the time division duplex system comprises: according to proportion of an uplink business volume and a downlink business volume, determining configuration proportion of an uplink time slot and a downlink time slot when at least one wireless frame is taken as a subframe distribution period; according to the configuration proportion of the uplink time slot and the downlink time slot, determining a distribution mode of an uplink business subframe and a downlink business subframe in at least one wireless frame. The device for the subframe distribution for the time division duplex system comprises a configuration proportion determination unit and a first distribution mode determination unit. The invention embodiment also provides a base station and user equipment.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of subframe distribution technology of tdd systems.
Background technology
3-G (Generation Three mobile communication system) (The 3rd Generation Mobile Communication; 3G) adopted code division multiple access access (Code Division Multiple Access; CDMA) technology is supported multimedia service, in several years of future, will have higher competitiveness.Permanently effective in order to ensure this competitiveness, (3rd Generation Partnership Project 3GPP) has started Long Term Evolution (Long Term Evolution, standardization effort LTE) in 3G (Third Generation) Moblie standardization body.(its subcarrier spacing is set at 15kHz for Othogonal Frequency Division Multiplex, OFDM) technology, and corresponding OFDM symbol lengths is 66.67us based on OFDM in the LTE system.The LTE system comprise time division duplex (Time Division Duplex, TDD) and FDD (Frequency DivisionDuplex, FDD) two kinds of duplex modes.
TD-SCDMA is the standard of unique employing TDD mode in three kinds of international standards of 3G system.The TD-SCDMA standard is supported the transmission of up-downgoing non-symmetrical service, on spectrum utilization, has bigger flexibility.TD-SCDMA system synthesis has adopted advanced technologies such as smart antenna, uplink synchronous, joint-detection and software radio, makes system have the higher performance and the availability of frequency spectrum.In order to keep the long-term competitiveness of TD-SCDMA system, the TD-SCDMA system needs Long Term Evolution equally.
For guarantee with the 3G system in unique TD-SCDMA standard coexistence based on the TDD mode; The LTETDD system has adopted frame structure as shown in Figure 1: a 10ms radio frames (Frame) is made up of two 5ms fields; Each field is by business time-slot (the Time Slot of 8 0.5ms; TS) and three special areas form, three special areas are respectively: descending pilot frequency time slot (DwPTS), come downwards to up protection interval (GP) and uplink pilot time slot (UpPTS).Two continuous business time-slots are formed a service subframe, and (Sub-Frame, SF), the length of each service subframe is 1ms.The length of three special areas can be by the high-level signaling flexible configuration, but total length keeps 1ms constant.Comprise 4 service subframe in each field, service subframe # 0 always is assigned as the transmission downlink business.Each field disposes a pair of switching point; Wherein come downwards to up switching point and be positioned at special area GP; Go upward to descending switching point and be positioned at other service subframe boundary except that service subframe # 0, two business time-slots of same service subframe can not carry out up-downgoing and switch.The parameter of business time-slot is provided by table 1 in the frame structure of LTETDD system, and (Cyclic Prefix, length CP) is confirmed the OFDM symbolic number that comprises in the business time-slot according to Cyclic Prefix in the OFDM symbol.
Table 1
| Business time-slot length | The OFDM symbolic number | CP length | ||
| Short CP | 15360Ts(0.5ms) | 7 | The 1st OFDM symbol 160Ts (5.21us) | Other 6 OFDM symbol 144Ts (4.69us) |
| |
6 | 512Ts(16.67us) |
When a business time-slot is assigned as the transmission uplink service, can be called ascending time slot, two ascending time slots are formed a uplink service subframe; When a business time-slot is assigned as the transmission downlink business, can be called descending time slot, two descending time slots are formed a downlink business subframe.Can the flexible allocation uplink and downlink timeslot, it is one of advantages of TDD mode that the allocation ratio through adjustment ascending time slot and descending time slot satisfies the different service needs.In the frame structure of LTE TDD system configuration; Two 5ms fields that comprise in 10ms radio frames are identical; The distribution that is uplink and downlink timeslot can only be carried out in the 5ms field; With the 5ms field is the assignment period of uplink and downlink timeslot, because a service subframe comprises that two business time-slots and two business time-slots can not carry out up-downgoing and switch, so the assignment period of uplink and downlink timeslot is the sub-frame allocation cycle.To being that all uplink service subframes and the method for salary distribution of downlink business subframe of sub-frame allocation during the cycle carried out brief account with the 5ms field in the LTE TDD system.As shown in Figure 2, SF0 representes service subframe # 0, and SF1 representes service subframe # 1, and SF2 representes service subframe # 2, and SF3 representes service subframe # 3; S representes special area, comprises DwPTS, GP and UpPTS.For the ease of distinguishing, the business time-slot that is assigned as the transmission downlink business is filled vertical line, the business time-slot that is assigned as the transmission uplink service is filled oblique line, special area is filled round dot.As can beappreciated from fig. 2; The ascending time slot of supporting in the LTE TDD system and the allocation ratio of descending time slot have four kinds; The corresponding a kind of method of salary distribution of each allocation ratio shows as a sub-frames allocated pattern in Fig. 2, be respectively: SF0 is the downlink business subframe in first kind of method of salary distribution; SF1, SF2 and SF3 are the uplink service subframe, descending time slot: the allocation ratio of ascending time slot is 1: 3; SF0 and SF3 are the downlink business subframe in second kind of method of salary distribution, and SF1 and SF2 are the uplink service subframe, descending time slot: the allocation ratio of ascending time slot is 2: 2; SF0, SF2 and SF3 are the downlink business subframe in the third method of salary distribution, and SF1 is the uplink service subframe, descending time slot: the allocation ratio of ascending time slot is 3: 1; SF0, SF1, SF2 and SF3 all are the downlink business subframe in the 4th kind of method of salary distribution, descending time slot: the allocation ratio of ascending time slot is 4: 0.With the 5ms field be sub-frame allocation during the cycle time slot corresponding ratio adjustment granularity be 25%.
Be the allocation ratio that the sub-frame allocation scheme in sub-frame allocation cycle is only supported four kinds of ascending time slots and descending time slot with the 5ms field in the existing LTE TDD system; Time slot ratio adjustment granularity is 25%; Time slot ratio adjustment granularity is bigger, adjustment underaction when satisfying the different service demand; Each field disposes a pair of switching point, and corresponding one comes downwards to up protection GP at interval, because GP is definite by the coverage of base station, under the large coverage scene, can cause the expense of GP bigger.
Summary of the invention
The embodiment of the invention provides a kind of subframe allocation method and device of tdd systems, in order to reduce time slot ratio adjustment granularity in the tdd systems, strengthens the flexibility of satisfying the different business demand.
The embodiment of the invention provides a kind of subframe allocation method of tdd systems, comprising:
According to the ratio of upstream traffic and downlink traffic, confirm with at least one radio frames to be the allocation ratio of sub-frame allocation ascending time slot and descending time slot during the cycle, wherein, the said sub-frame allocation cycle is the assignment period of uplink and downlink timeslot;
Confirm the method for salary distribution of uplink service subframe and downlink business subframe in said at least one radio frames according to the allocation ratio of said ascending time slot and descending time slot.
The embodiment of the invention provides a kind of sub-frame allocation device of tdd systems, comprising:
Allocation ratio is confirmed the unit: be used for the ratio according to upstream traffic and downlink traffic; Confirm with at least one radio frames to be the allocation ratio of sub-frame allocation ascending time slot and descending time slot during the cycle; Wherein, the assignment period that is uplink and downlink timeslot of said sub-frame allocation cycle;
First method of salary distribution is confirmed the unit: the method for salary distribution that is used for confirming according to the allocation ratio of said ascending time slot and descending time slot said at least one radio frames uplink service subframe and downlink business subframe.
The embodiment of the invention provides a kind of base station, comprising:
Allocation ratio is confirmed the unit: be used for the ratio according to upstream traffic and downlink traffic; Confirm with at least one radio frames to be the allocation ratio of sub-frame allocation ascending time slot and descending time slot during the cycle; Wherein, the assignment period that is uplink and downlink timeslot of said sub-frame allocation cycle;
First method of salary distribution is confirmed the unit: the method for salary distribution that is used for confirming according to the allocation ratio of said ascending time slot and descending time slot said at least one radio frames uplink service subframe and downlink business subframe.
The embodiment of the invention provides a kind of subframe allocation method of tdd systems, comprises following step:
Reception is the sub-frame allocation during cycle with at least one radio frames, the indication information of uplink service subframe and downlink business sub-frame allocation mode in said at least one radio frames, and wherein, the said sub-frame allocation cycle is the assignment period of uplink and downlink timeslot;
Confirm the method for salary distribution of uplink service subframe and downlink business subframe in said at least one radio frames according to said indication information;
Confirm uplink service subframe and downlink business subframe in said at least one radio frames according to the said method of salary distribution.
The embodiment of the invention provides a kind of sub-frame allocation device of tdd systems, comprising:
The indication information receiving element: being used for receiving with at least one radio frames is that sub-frame allocation is during the cycle; The indication information of uplink service subframe and downlink business sub-frame allocation mode in said at least one radio frames; Wherein, the assignment period that is uplink and downlink timeslot of said sub-frame allocation cycle;
Second method of salary distribution is confirmed the unit: the method for salary distribution that is used for confirming according to said indication information said at least one radio frames uplink service subframe and downlink business subframe;
Sub-frame allocation unit: the uplink service subframe and the downlink business subframe that are used for confirming said at least one radio frames according to the said method of salary distribution.
The embodiment of the invention provides a kind of subscriber equipment, comprising:
The indication information receiving element: being used for receiving with at least one radio frames is that sub-frame allocation is during the cycle; The indication information of uplink service subframe and downlink business sub-frame allocation mode in said at least one radio frames; Wherein, the assignment period that is uplink and downlink timeslot of said sub-frame allocation cycle;
Second method of salary distribution is confirmed the unit: the method for salary distribution that is used for confirming according to said indication information said at least one radio frames uplink service subframe and downlink business subframe;
Sub-frame allocation unit: the uplink service subframe and the downlink business subframe that are used for confirming said at least one radio frames according to the said method of salary distribution.
The subframe allocation method of the tdd systems that the embodiment of the invention provides and device; Confirm with at least one radio frames to be the sub-frame allocation cycle; Increased the kind of the allocation ratio of ascending time slot and descending time slot; Can select the method for salary distribution of uplink service subframe and downlink business subframe according to the ratio of upstream traffic and downlink traffic, reduce time slot ratio adjustment granularity, strengthen the flexibility of satisfying the different business demand.
Description of drawings
Fig. 1 is a LTE TDD system frame structure sketch map in the prior art;
Fig. 2 is the sub-frame allocation pattern sketch map that is assignment period with half radio frames in the prior art;
Fig. 3 is for being the sub-frame allocation pattern sketch map of sub-frame allocation cycle and 2 pairs of switching points with the radio frames in the embodiment of the invention;
Fig. 4 is for being the sub-frame allocation pattern sketch map of sub-frame allocation cycle and 1 pair of switching point with the radio frames in the embodiment of the invention;
Fig. 5 is for being sub-frame allocation cycle and the sub-frame allocation pattern sketch map that does not have switching point with the radio frames in the embodiment of the invention;
Fig. 6 is the subframe allocation method flow chart of base station side in the embodiment of the invention;
Fig. 7 is the subframe allocation method flow chart of user equipment side in the embodiment of the invention;
Fig. 8 is the sub-frame allocation device block diagram of TDD system in the embodiment of the invention.
Embodiment
It is the restriction in sub-frame allocation cycle that the embodiment of the invention breaks through in the frame structure of existing LTE TDD system with the 5ms field; Having proposed with at least one 10ms radio frames is the subframe allocation method in sub-frame allocation cycle; In order to reduce time slot ratio adjustment granularity, strengthen the flexibility of satisfying the different business demand.
The embodiment of the invention is the sub-frame allocation cycle with the 10ms radio frames at first, introduces allocation ratio and the uplink service subframe of correspondence and the method for salary distribution of downlink business subframe of ascending time slot and descending time slot in detail.In a radio frames, can dispose two pairs of switching points at most, the logarithm according to the switching point that disposes specifically can have the following several kinds of methods of salary distribution, describes in detail below:
When disposing 2 pairs of switching points in the 10ms radio frames, have 10 kinds of methods of salary distribution, every kind of corresponding a kind of sub-frame allocation pattern of the method for salary distribution; As shown in Figure 3; Adopt identical method for expressing for the ease of comparison diagram 3 with Fig. 2, SF0 representes service subframe # 0, and SF1 representes service subframe # 1; SF2 representes service subframe # 2, and SF3 representes service subframe # 3; S representes special area, comprises DwPTS, GP and UpPTS.The business time-slot that is assigned as the transmission downlink business is filled vertical line, the business time-slot that is assigned as the transmission uplink service is filled oblique line, special area is filled round dot.The sub-frame allocation pattern of two 5ms fields can be identical in the 10ms radio frames, also can be inequality, according to sequence number among Fig. 3 10 kinds of subframe distribution diagram appearance are described in detail:
Sequence number is that the SF0 of each 5ms field is the downlink business subframe in 1 the sub-frame allocation pattern, and SF1, SF2 and SF3 are the uplink service subframe; Descending time slot: the allocation ratio of ascending time slot is 2: 6;
Sequence number is that the SF0 of a 5ms field is the downlink business subframe in 2 the sub-frame allocation pattern, and SF1, SF2 and SF3 are the uplink service subframe; The SF0 of another 5ms field and SF3 are the downlink business subframe, and SF1 and SF2 are the uplink service subframe; Descending time slot: the allocation ratio of ascending time slot is 3: 5;
Sequence number is that the SF0 of a 5ms field is the downlink business subframe in 3 the sub-frame allocation pattern, and SF1, SF2 and SF3 are the uplink service subframe; The SF0 of another 5ms field, SF2 and SF3 are the downlink business subframe, and SF1 is the uplink service subframe; Descending time slot: the allocation ratio of ascending time slot is 4: 4;
Sequence number is that the SF0 of a 5ms field is the downlink business subframe in 4 the sub-frame allocation pattern, and SF1, SF2 and SF3 are the uplink service subframe; The SF0 of another 5ms field, SF 1, SF2 and SF3 all are the downlink business subframe; Descending time slot: the allocation ratio of ascending time slot is 5: 3;
Sequence number is that the SF0 of each 5ms field and SF3 are the downlink business subframe in 5 the sub-frame allocation pattern, and SF1 and SF2 are the uplink service subframe; Descending time slot: the allocation ratio of ascending time slot is 4: 4;
Sequence number is that the SF0 of a 5ms field and SF3 are the downlink business subframe in 6 the sub-frame allocation pattern, and SF1 and SF2 are the uplink service subframe; The SF0 of another 5ms field, SF2 and SF3 are the downlink business subframe, and SF1 is the uplink service subframe; Descending time slot: the allocation ratio of ascending time slot is 5: 3;
Sequence number is that the SF0 of a 5ms field and SF3 are the downlink business subframe in 7 the sub-frame allocation pattern, and SF1 and SF2 are the uplink service subframe; The SF0 of another 5ms field, SF1, SF2 and SF3 all are the downlink business subframe; Descending time slot: the allocation ratio of ascending time slot is 6: 2;
Sequence number is that the SF0 of two 5ms fields, SF2 and SF3 are the downlink business subframe in 8 the sub-frame allocation pattern, and SF1 is the uplink service subframe; Descending time slot: the allocation ratio of ascending time slot is 6: 2;
Sequence number is that the SF0 of a 5ms field, SF2 and SF3 are the downlink business subframe in 9 the sub-frame allocation pattern, and SF1 is the uplink service subframe; The SF0 of another 5ms field, SF1, SF2 and SF3 all are the downlink business subframe; Descending time slot: the allocation ratio of ascending time slot is 7: 1;
Sequence number is that the SF0 of two 5ms fields, SF1, SF2 and SF3 all are the downlink business subframe in 10 the sub-frame allocation pattern; Descending time slot: the allocation ratio of ascending time slot is 8: 0.
When disposing 2 pairs of switching points in the radio frames; But two special area separate configurations that field is interior in this radio frames; Promptly the length of DwPTS, UpPTS can be unequal in two special areas; But the length of two interior GP of field should equate that GP length is configured according to the coverage requirement of base station.
When disposing 1 pair of switching point in the 10ms radio frames, have 4 kinds of methods of salary distribution, every kind of corresponding a kind of sub-frame allocation pattern of the method for salary distribution; As shown in Figure 4; Adopt identical method for expressing with Fig. 3, just for special area, if there is not configurating downlink to up switching point in this special area; Be full downlink transfer so, then fill vertical line equally; If disposed in this special area and come downwards to up switching point, so special area has been filled round dot.Subframe distribution diagram appearance sequence number is arranged downwards according to Fig. 3 in order among Fig. 4, according to sequence number among Fig. 44 kinds of subframe distribution diagram appearance is described in detail:
Sequence number is that the SF0 of two 5ms fields, SF1, SF2 and SF3 all are the downlink business subframe in 11 the sub-frame allocation pattern; Descending time slot: the allocation ratio of ascending time slot is 8: 0; The a pair of switching point of configuration in one of them field;
Sequence number is that the SF0 of a 5ms field, SF2 and SF3 are the downlink business subframe in 12 the sub-frame allocation pattern, and SF1 is the uplink service subframe, a pair of switching point of configuration in this field; The SF0 of another 5ms field, SF1, SF2 and SF3 all are the downlink business subframe, do not dispose switching point in this field; Descending time slot: the allocation ratio of ascending time slot is 7: 1;
Sequence number is that the SF0 of a 5ms field and SF3 are the downlink business subframe in 13 the sub-frame allocation pattern, and SF1 and SF2 are the uplink service subframe, a pair of switching point of configuration in this field; The SF0 of another 5ms field, SF1, SF2 and SF3 all are the downlink business subframe, do not dispose switching point in this field; Descending time slot: the allocation ratio of ascending time slot is 6: 2;
Sequence number is that the SF0 of a 5ms field is the downlink business subframe in 14 the sub-frame allocation pattern, and SF1, SF2 and SF3 are the uplink service subframe, do not dispose switching point in this field; The SF0 of another 5ms field, SF1, SF2 and SF3 all are the downlink business subframe, do not dispose switching point in this field; Descending time slot: the allocation ratio of ascending time slot is 5: 3;
When disposing 1 pair of switching point in the radio frames, have only a pair of switching point of configuration in one of them field in this radio frames, its special area is made up of DwPTS, GP and UpPTS, and the length of GP is configured according to the coverage requirement of base station.Be configured to full downlink transfer in another field, all business time-slots are descending time slot, and its special area includes only DwPTS, and the length of GP and UpPTS is 0.
When not disposing switching point in the 10ms radio frames, a kind of method of salary distribution is arranged, corresponding a kind of sub-frame allocation pattern, as shown in Figure 5, adopt identical method for expressing with Fig. 4, and sub-frame allocation pattern sequence number is introduced as follows according to Fig. 4 arrangement downwards in order:
Sequence number is that the SF0 of two 5ms fields, SF1, SF2 and SF3 all are the downlink business subframe in 15 the sub-frame allocation pattern; Descending time slot: the allocation ratio of ascending time slot is 8: 0; Do not dispose switching point in two fields.
When not disposing switching point in the radio frames; Each field in this radio frames all is configured to full downlink transfer, and all business time-slots are descending time slot, and special area is and includes only DwPTS; The length of GP and UpPTS is 0, is used for Multicast Broadcast Single Frequency Network (MBSFN).
During a pair of switching point of configuration, wherein come downwards to up switching point and be positioned at special area GP in one of them field of a radio frames, go upward to descending switching point and be positioned at other service subframe boundary except that service subframe # 0; When four service subframe all are the downlink business subframe in one of them field of a radio frames; A pair of switching point can be disposed and also switching point can be do not disposed; When a pair of switching point of configuration; Come downwards to up switching point and be positioned at special area GP, go upward to the boundary that descending switching point is positioned at service subframe # 1.
With the 10ms radio frames is that sub-frame allocation is during the cycle; Support the method for salary distribution of 15 kinds of uplink service subframes and downlink business subframe altogether; Be expressed as 15 kinds of subframe distribution diagram appearance, make the ascending time slot supported in the TDD system and the allocation ratio of descending time slot reach seven kinds, descending time slot: the allocation ratio of ascending time slot was respectively 2: 6,3: 5,4: 4,5: 3,6: 2,7: 1 and 8: 0; Ratio is that sub-frame allocation has more three kinds during the cycle with the 5ms field; Make time slot ratio adjustment granularity become 12.5%, adjustment accurately, has strengthened the flexibility of satisfying the different business demand more flexibly.Support the allocation ratio of seven kinds of ascending time slots and descending time slot in the method for salary distribution of 15 kinds of uplink service subframes and downlink business subframe, the method for salary distribution that makes some allocation ratio to adopt has multiple.For example, descending time slot: the allocation ratio of ascending time slot is 7: 1 o'clock, and correspondence in radio frames, disposes a pair of switching point and two pairs of switching points respectively have a kind of method of salary distribution.Can reduce time delay because increase the logarithm of switching point, so in the lower time time-delay of system requirements, the method for salary distribution of preferred two pairs of switching points; Because the logarithm that reduces switching point can reduce the expense of GP, so when the base station range of system requirements is big, the method for salary distribution of preferred a pair of switching point; The concrete method of salary distribution can be selected according to system's actual demand flexibly.
With the 10ms radio frames is that sub-frame allocation is during the cycle; Support 15 kinds of methods of salary distribution altogether; The base station can be through the indication of 4bit signaling in broadcast; For example 0000 expression sequence number is 1 the corresponding method of salary distribution of sub-frame allocation pattern, and 0001 expression sequence number is 2 the corresponding method of salary distribution of sub-frame allocation pattern, and the rest may be inferred.Simultaneously, in order to guarantee the search performance of sub-district, the master sync signal of base station (P-SCH) sends once in every field, and particular location is in first OFDM symbol of each DwPTS time slot.
Certainly, the sub-frame allocation cycle also is not limited to a radio frames, and the sub-frame allocation cycle can be an above radio frames.Be sub-frame allocation during the cycle with two radio frames for example, corresponding ascending time slot can comprise 4: 12 with the allocation ratio of descending time slot, 5: 11,6: 10,7: 9 or the like, and it is 6.25% that the time slot corresponding ratio is adjusted granularity.The sub-frame allocation cycle reduces time slot ratio adjustment granularity at least one radio frames promptly can reach, and strengthens the purpose that satisfies the flexibility of different business demand.
Based on above analysis, the embodiment of the invention provides the subframe allocation method of a kind of TDD system, and is as shown in Figure 6, comprising:
S601, according to the ratio of upstream traffic and downlink traffic, confirm with at least one radio frames to be the allocation ratio of sub-frame allocation ascending time slot and descending time slot during the cycle;
Can set a measurement period, in this measurement period, upstream traffic in the sub-district and downlink traffic added up, thereby determine the ratio of upstream traffic and downlink traffic and configuration and renewal in the base station; Certainly, also can artificially set system requirements upstream traffic and downlink traffic ratio and be configured in the base station;
S602, confirm the method for salary distribution of uplink service subframe and downlink business subframe at least one radio frames according to the allocation ratio of ascending time slot and descending time slot.
S601 and S602 have accomplished the sub-frame allocation of base station side, realize communicating by letter between base station and the subscriber equipment, and be further comprising the steps of:
S603, the indication information of broadcasting uplink service subframe and downlink business sub-frame allocation mode at least one radio frames.
This indication information is broadcasted through broadcast channel by the base station, if be the sub-frame allocation cycle with a radio frames, needs the method for salary distribution that adopts the indication of 4bit signaling to select.
More excellent, according to the logarithm of the switching point that disposes in the method for salary distribution, can also take all factors into consideration the time-delay or the base station range of system requirements, select the optimal allocation mode according to system requirements, specifically be divided into two kinds of situation:
When the base station range of system requirements during, confirm the method for salary distribution of a pair of switching point of configuration in one of them field more than or equal to first thresholding set.
When the time delay of system requirements is less than or equal to second thresholding of setting, confirm the method for salary distribution of a pair of switching point of configuration in each field.
According to the subframe allocation method of base station side, to user equipment side the subframe allocation method of a kind of TDD system is provided simultaneously, as shown in Figure 7, comprising:
S701, to receive with at least one radio frames be sub-frame allocation during the cycle, the indication information of uplink service subframe and downlink business sub-frame allocation mode at least one radio frames;
S702, confirm the method for salary distribution of uplink service subframe and downlink business subframe at least one radio frames according to the indication information of uplink service subframe and downlink business sub-frame allocation mode;
S703, confirm uplink service subframe and downlink business subframe at least one radio frames according to the method for salary distribution of uplink service subframe and downlink business subframe.
Like this, identical frame structure is adopted with subscriber equipment in the base station, can communicate through the frame structure of configuration.
The embodiment of the invention provides the sub-frame allocation device of a kind of TDD system respectively in base station and subscriber equipment, as shown in Figure 8, the sub-frame allocation device of base station side comprises:
Allocation ratio is confirmed unit 811: be used for the ratio according to upstream traffic and downlink traffic, confirm with at least one radio frames to be the allocation ratio of sub-frame allocation ascending time slot and descending time slot during the cycle;
First method of salary distribution is confirmed unit 812: the method for salary distribution that is used for confirming according to the allocation ratio of ascending time slot and descending time slot at least one radio frames uplink service subframe and downlink business subframe.
In order to make the base station can adopt identical frame structure, also comprise in the sub-frame allocation device of base station side with subscriber equipment:
Indication information transmitting element 813: the indication information that is used for broadcasting said at least one radio frames uplink service subframe and downlink business sub-frame allocation mode.
The sub-frame allocation device of user equipment side comprises:
Indication information receiving element 821: being used for receiving with at least one radio frames is sub-frame allocation during the cycle, the indication information of uplink service subframe and downlink business sub-frame allocation mode in said at least one radio frames;
Second method of salary distribution is confirmed unit 822: the method for salary distribution that is used for confirming according to said indication information said at least one radio frames uplink service subframe and downlink business subframe;
Sub-frame allocation unit 823: the uplink service subframe and the downlink business subframe that are used for confirming at least one radio frames according to the method for salary distribution of uplink service subframe and downlink business subframe.
The sub-frame allocation scheme of the TDD system that the embodiment of the invention provides; Can select the method for salary distribution of uplink service subframe and downlink business subframe according to the ratio of upstream traffic and downlink traffic; Reduce time slot ratio adjustment granularity, strengthened the flexibility of satisfying the different business demand;
This schemes synthesis has been considered the time delay and the base station range of system requirements; Under the large coverage scene; Effectively reduced the expense of GP through the method for salary distribution of selecting only to dispose a pair of switching point; Under the lower time delay situation of system requirements, effectively controlled the time-delay of system through the method for salary distribution of selecting a pair of switching point of configuration in each field.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (19)
1. the subframe allocation method of a tdd systems is characterized in that, comprising:
According to the ratio of upstream traffic and downlink traffic, confirm with at least one radio frames to be the allocation ratio of sub-frame allocation ascending time slot and descending time slot during the cycle, wherein, the said sub-frame allocation cycle is the assignment period of uplink and downlink timeslot;
Confirm the method for salary distribution of uplink service subframe and downlink business subframe in said at least one radio frames according to the allocation ratio of said ascending time slot and descending time slot.
2. the method for claim 1 is characterized in that, also comprises: the indication information of broadcasting uplink service subframe and downlink business sub-frame allocation mode in said at least one radio frames.
3. the method for claim 1 is characterized in that, with a radio frames be sub-frame allocation during the cycle allocation ratio of said ascending time slot and descending time slot comprise: descending time slot: ascending time slot is 2: 6, and,
In the method for salary distribution according to uplink service subframe and downlink business subframe in said 2: the 6 definite radio frames: first service subframe in each field of said radio frames is the downlink business subframe, and other three service subframe are the uplink service subframe; The a pair of switching point of configuration in each field.
4. the method for claim 1 is characterized in that, with a radio frames be sub-frame allocation during the cycle allocation ratio of said ascending time slot and descending time slot comprise: descending time slot: ascending time slot is 3: 5, and,
In the method for salary distribution according to uplink service subframe and downlink business subframe in said 3: the 5 definite radio frames: first service subframe in the field of said radio frames is the downlink business subframe, and other three service subframe are the uplink service subframe; First service subframe in another field and the 4th service subframe are the downlink business subframe, and other two service subframe are the uplink service subframe; The a pair of switching point of configuration in each field.
5. the method for claim 1 is characterized in that, with a radio frames be sub-frame allocation during the cycle allocation ratio of said ascending time slot and descending time slot comprise: descending time slot: ascending time slot is 4: 4, and,
In first kind of method of salary distribution according to uplink service subframe and downlink business subframe in said 4: the 4 definite radio frames: first service subframe in each field of said radio frames and the 4th service subframe are the downlink business subframe, and other two service subframe are the uplink service subframe; The a pair of switching point of configuration in each field; Perhaps,
In second kind of method of salary distribution according to uplink service subframe and downlink business subframe in said 4: the 4 definite radio frames: first service subframe in the field of said radio frames is the downlink business subframe, and other three service subframe are the uplink service subframe; Second service subframe in another field is the uplink service subframe, and other three service subframe are the downlink business subframe; The a pair of switching point of configuration in each field.
6. the method for claim 1 is characterized in that, with a radio frames be sub-frame allocation during the cycle allocation ratio of said ascending time slot and descending time slot comprise: descending time slot: ascending time slot is 5: 3, and,
In first kind of method of salary distribution according to uplink service subframe and downlink business subframe in said 5: the 3 definite radio frames: four service subframe in the field of said radio frames all are the downlink business subframe; First service subframe in another field is the downlink business subframe, and other three service subframe are the uplink service subframe; The a pair of switching point of configuration in each field; Perhaps,
In second kind of method of salary distribution according to uplink service subframe and downlink business subframe in said 5: the 3 definite radio frames: second service subframe in the field of said radio frames is the uplink service subframe, and other three service subframe are the downlink business subframe; First service subframe and the 4th service subframe are the downlink business subframe in another field, and other two service subframe are the uplink service subframe; The a pair of switching point of configuration in each field;
In the third method of salary distribution according to uplink service subframe and downlink business subframe in said 5: the 3 definite radio frames: four service subframe in the field of said radio frames all are the downlink business subframe, do not dispose switching point in this field; First service subframe in another field is the downlink business subframe, and other three service subframe are the uplink service subframe, a pair of switching point of configuration in this field.
7. the method for claim 1 is characterized in that, with a radio frames be sub-frame allocation during the cycle allocation ratio of said ascending time slot and descending time slot comprise: descending time slot: ascending time slot is 6: 2, and,
In first kind of method of salary distribution according to uplink service subframe and downlink business subframe in said 6: the 2 definite radio frames: four service subframe in the field of said radio frames all are the downlink business subframe; First service subframe in another field and the 4th service subframe are the downlink business subframe, and other two service subframe are the uplink service subframe; The a pair of switching point of configuration in each field; Perhaps,
In second kind of method of salary distribution according to uplink service subframe and downlink business subframe in said 6: the 2 definite radio frames: second service subframe in each field of said radio frames is the uplink service subframe, and other three service subframe are the downlink business subframe; The a pair of switching point of configuration in each field; Perhaps,
In the third method of salary distribution according to uplink service subframe and downlink business subframe in said 6: the 2 definite radio frames: four service subframe in the field of said radio frames all are the downlink business subframe, do not dispose switching point in this field; First service subframe in another field and the 4th service subframe are the downlink business subframe, and other two service subframe are the uplink service subframe, a pair of switching point of configuration in this field.
8. the method for claim 1 is characterized in that, with a radio frames be sub-frame allocation during the cycle allocation ratio of said ascending time slot and descending time slot comprise: descending time slot: ascending time slot is 7: 1, and,
In first kind of method of salary distribution according to uplink service subframe and downlink business subframe in said 7: the 1 definite radio frames: four service subframe in the field of said radio frames all are the downlink business subframe; Second service subframe in another field is the uplink service subframe, and other three service subframe are the downlink business subframe; The a pair of switching point of configuration in each field;
In second kind of method of salary distribution according to uplink service subframe and downlink business subframe in said 7: the 1 definite radio frames: four service subframe all are the downlink business subframe in the field of said radio frames, do not dispose switching point in this field; Second service subframe in another field is the uplink service subframe, and other three service subframe are the downlink business subframe, a pair of switching point of configuration in this field.
9. the method for claim 1 is characterized in that, with a radio frames be sub-frame allocation during the cycle allocation ratio of said ascending time slot and descending time slot comprise: descending time slot: ascending time slot is 8: 0, and,
In first kind of method of salary distribution according to uplink service subframe and downlink business subframe in said 8: the 0 definite radio frames: four service subframe in each field of said radio frames all are the downlink business subframe; The a pair of switching point of configuration in each field; Perhaps,
In second kind of method of salary distribution according to uplink service subframe and downlink business subframe in said 8: the 0 definite radio frames: four service subframe in each field of said radio frames all are the downlink business subframe; The a pair of switching point of configuration in one of them field; Perhaps,
In the third method of salary distribution according to uplink service subframe and downlink business subframe in said 8: the 0 definite radio frames: four service subframe in each field of said radio frames all are the downlink business subframe, do not dispose switching point in each field.
10. like the arbitrary described method of claim 1 to 9, it is characterized in that, when configuration in the field of radio frames during a pair of switching point, the special area in this field by descending pilot frequency time slot, come downwards to up protection interval and uplink pilot time slot is formed; When not disposing switching point in the field of radio frames, special area is made up of descending pilot frequency time slot.
11., it is characterized in that the ratio of said upstream traffic and downlink traffic is upgraded according to the upstream traffic and the downlink traffic of periodic statistics like the arbitrary described method of claim 1 to 9.
12. like the arbitrary described method of claim 6 to 8, it is characterized in that,, confirm the method for salary distribution of a pair of switching point of configuration in one of them field when the base station range of system requirements during more than or equal to the first threshold set.
13. like the arbitrary described method of claim 6 to 8, it is characterized in that, when the time delay of system requirements is less than or equal to second threshold value of setting, confirm the method for salary distribution of a pair of switching point of configuration in each field.
14. the sub-frame allocation device of a tdd systems is characterized in that, comprising:
Allocation ratio is confirmed the unit: be used for the ratio according to upstream traffic and downlink traffic; Confirm with at least one radio frames to be the allocation ratio of sub-frame allocation ascending time slot and descending time slot during the cycle; Wherein, the assignment period that is uplink and downlink timeslot of said sub-frame allocation cycle;
First method of salary distribution is confirmed the unit: the method for salary distribution that is used for confirming according to the allocation ratio of said ascending time slot and descending time slot said at least one radio frames uplink service subframe and downlink business subframe.
15. device as claimed in claim 14 is characterized in that, said device also comprises:
Indication information transmitting element: the indication information that is used for broadcasting said at least one radio frames uplink service subframe and downlink business sub-frame allocation mode.
16. a base station is characterized in that, comprises like claim 14 or 15 described devices.
17. the subframe allocation method of a tdd systems is characterized in that, comprising:
Reception is the sub-frame allocation during cycle with at least one radio frames, the indication information of uplink service subframe and downlink business sub-frame allocation mode in said at least one radio frames, and wherein, the said sub-frame allocation cycle is the assignment period of uplink and downlink timeslot;
Confirm the method for salary distribution of uplink service subframe and downlink business subframe in said at least one radio frames according to said indication information;
Confirm uplink service subframe and downlink business subframe in said at least one radio frames according to the said method of salary distribution.
18. the sub-frame allocation device of a tdd systems is characterized in that, comprising:
The indication information receiving element: being used for receiving with at least one radio frames is that sub-frame allocation is during the cycle; The indication information of uplink service subframe and downlink business sub-frame allocation mode in said at least one radio frames; Wherein, the assignment period that is uplink and downlink timeslot of said sub-frame allocation cycle;
Second method of salary distribution is confirmed the unit: the method for salary distribution that is used for confirming according to said indication information said at least one radio frames uplink service subframe and downlink business subframe;
Sub-frame allocation unit: the uplink service subframe and the downlink business subframe that are used for confirming said at least one radio frames according to the said method of salary distribution.
19. a subscriber equipment is characterized in that, comprises device as claimed in claim 18.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710177030A CN101431362B (en) | 2007-11-08 | 2007-11-08 | Subframe distribution method and apparatus for TDD 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 |
| 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 |
| 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 |
| 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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| CN200710177030A CN101431362B (en) | 2007-11-08 | 2007-11-08 | Subframe distribution method and apparatus for TDD system |
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| CN101431362A CN101431362A (en) | 2009-05-13 |
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