CN102711261A - Sub-frame configuration method and device used in dual-mode RRU (radio remote unit) - Google Patents
Sub-frame configuration method and device used in dual-mode RRU (radio remote unit) Download PDFInfo
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Abstract
The invention discloses a sub-frame configuration method and device used in a dual-mode RRU, aiming to solve the problem existing in the prior art that the downlink and uplink time slots in a TD-SCDMA (time division-synchronous code division multiple access) system and a TD-LTE (time division-long term evolution) system in the dual-mode RRU, and the problem that the system throughput is influenced by adjusting GP of the TD-LTE system to obviate uplink-downlink interference. The method comprises defining transfer time and non-transfer time in the TD-LTE system; bearing service data on all OFDM (orthogonal frequency division multiplexing) signs in DwPTS (downlink pilot time slot) of the TD-LTE system in the transfer time of each half frame; and switching downlink data transmission to uplink data transmission in the set time of the last OFDM sign of the DwPTS, so as to reserve the data service function of the DwPTS of the TD-LTE system as much as possible without influencing the routine measurement and the performance of the TD-SCDMA system, thereby effectively improving the throughput of the TD-LTE system.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of sub-frame configuration method and device that is applied among the bimodulus RRU.
Background technology
At present; Power between multiband is shared and is waited the wideband characteristic to be written into the relevant enterprise standard of mobile base station; The wideband theory is accepted by numerous suppliers and operator, becomes industry main flow and developing direction, therefore; Wideband RRU (Radio Remote Unit, radio frequency remoto module) has obtained using widely.With respect to narrow frequency RRU and Two bors d's oeuveres RRU, wideband RRU can the simplified apparatus form, promotes the network maturity, reduces network design difficulty and network operation cost, guarantees the network smooth evolution, and therefore, application wideband RRU base station has become main flow trend.
Bimodulus RRU comprises TD-SCDMA (Time Division Synchronized Code Division Multiple Access; TD SDMA) the wideband RRU of the frequency range of using and TD-LTE (TD-SCDMA Long Term Evolution, the TD SDMA-Long Term Evolution) frequency range of using.Because reception and sendaisle that bimodulus RRU adopts are shared, therefore can there be interference phenomenon, for example, when the TD-SCDMA frequency range was transmit status, the TD-LTE frequency range was an accepting state, this moment, two frequency range reiving/transmitting states were inconsistent, can have interference phenomenon.As shown in table 1 is TD-LTE system special subframe allocation list, and this form is a foundation with agreement 36.211, with sampling optimization unit.
Table 1
Be illustrated in figure 1 as under the prior art allocation plan with TD-SCDMA 5:2 and TD-LTE system ascending-descending subframes configuration 2 (3:1:1).The 5:2 of TD-SCDMA system is meant 5 descending time slots and 2 ascending time slots.TD-LTE system sub-frame configuration 2 is corresponding to the sub-frame configuration in the table 22, and 3:1:1 wherein is meant under the situation of configuration 2 in every field, 3 descending sub frames, 1 sub-frame of uplink and 1 special subframe are arranged.Can know that from Fig. 1 after using prior art and getting rid of up-downgoing between TD-SCDMA frequency range and TD-LTE frequency range and disturb, being configured in before the adjustment that is left intact of the up-downgoing conflict of these two kinds of frequency ranges is incompatible.
Table 2
And; This interference phenomenon can not adopt filter apparatus such as closing path filter to get rid of; This is to handle because filter apparatus can be used as one road signal with TD-SCDMA and TD-LTE frequency range; When the transmitting-receiving of two frequency ranges was consistent, the signal of a frequency range of filter apparatus meeting filtering caused signal normally not send.
Under the prior art; Solving TD-SCDMA and TD-LTE among the bimodulus RRU receives and dispatches the method that occurs the problem of interfering with each other when inconsistent and is; Frame head position through translation TD-LTE and TD-SCDMA signal transmitted; Thereby guarantee the switching point alignment of sub-frame of uplink when descending sub frame switches in above-mentioned two frequency ranges, and avoid the interference between up-downgoing through the GP in the adjustment TD-LTE frequency range (guard period, protection time slot) size.In the TD-LTE system, 9 ~ 12 OFDM symbols can carry the data business volume of general 20Mbps, and through after using long GP to avoid the up-downgoing of two kinds of systems to disturb, with the throughput that reduces TD-LTE greatly.
Therefore, though said method has solved the interference problem between TD-SCDMA frequency range and the up-downgoing of TD-LTE frequency range among the bimodulus RRU, can not guarantee that all time slot ratios in TD-SCDMA frequency range and the TD-LTE frequency range can both coexist.Simultaneously, this method has limited the configuration that DwPTS grows in the configuration of TD-LTE special subframe and all can not adopt, thereby influences the throughput of whole system.
Summary of the invention
The embodiment of the invention provides a kind of sub-frame configuration method and device that is applied among the bimodulus RRU; Can not coexist in order to uplink and downlink timeslot in TD-SCDMA system and the TD-LTE system among the bimodulus RRU that exists in the solution prior art, adopt the GP that adjusts TD-LTE to avoid the problem of the interference effect throughput of system of up-downgoing.
The concrete technical scheme that the embodiment of the invention provides is following:
A kind of sub-frame configuration method that is applied among the bimodulus RRU comprises:
In the TD-LTE system, define and let time and non-selling the time; Wherein, The said time of selling does the end for the TD-SCDMA system and makes an uproar and measure and DwPTS time of the corresponding TD-LTE system of cycle institute of calibration, saidly non-ly sells the time for except that the time of selling, being used for the DwPTS time of TD-LTE system use;
Sell in the time bearer service data on all the OFDM symbols in the DwPTS of TD-LTE system the non-of every field.
A kind of sub-frame configuration device that is applied among the bimodulus RRU comprises:
Dispensing unit; Be used for defining and let time and non-selling the time in the TD-LTE system; Wherein, The said time of selling does the end for the TD-SCDMA system and makes an uproar and measure and DwPTS time of the corresponding TD-LTE system of cycle institute of calibration, saidly non-ly sells the time for except that the time of selling, being used for the DwPTS time of TD-LTE system use;
Scheduling unit is used for selling in the time the non-of every field, bearer service data on all the OFDM symbols in the DwPTS of TD-LTE system.
In the embodiment of the invention; Let time and non-selling the time through in the TD-LTE system, defining; Selling in the time of every field, bearer service data on all the OFDM symbols in the DwPTS of TD-LTE system can be under the prerequisite of general measure that neither influences TD-SCDMA and performance; The data service function that as far as possible keeps the DwPTS of TD-LTE system, thus the TD-LTE throughput of system effectively improved.
Description of drawings
Fig. 1 is with the allocation plan of TD-SCDMA 5:2 and TD-LTE system ascending-descending subframes configuration 2 (3:1:1) under the prior art;
Fig. 2 is for being applied to the structure chart of the sub-frame configuration device among the bimodulus RRU in the embodiment of the invention;
Fig. 3 is for being applied to carry out among the bimodulus RRU flow chart of sub-frame configuration in the embodiment of the invention;
Fig. 4 is the transmitting-receiving switching point sketch map of subframe collocation method in the embodiment of the invention;
Fig. 5 is an adjusted allocation plan with TD-SCDMA 5:2 and TD-LTE system ascending-descending subframes configuration 2 (3:1:1) in the embodiment of the invention.
Embodiment
Uplink and downlink timeslot can not coexist in the TD-SCDMA system and TD-LTE system in order to solve among the bimodulus RRU; When adopting the GP method of adjusting TD-LTE to avoid the interference of up-downgoing; Influence the problem of throughput of system, in the embodiment of the invention, let time and non-selling the time through in the TD-LTE system, defining; Selling in the time of every field; Bearer service data on all OFDM symbols in the DwPTS of TD-LTE system, and the setting-up time behind last OFDM symbol of DwPTS switches to transmitting uplink data by downlink data transmission, can be under the prerequisite of general measure that neither influences TD-SCDMA and performance; The data service function that as far as possible keeps the DwPTS of TD-LTE system, thus the TD-LTE throughput of system effectively improved.
Below in conjunction with accompanying drawing the preferred embodiment of the present invention is elaborated.
Consult shown in Figure 2ly, in the embodiment of the invention, be applied to sub-frame configuration device among the bimodulus RRU and comprise dispensing unit 21 and scheduling unit 22, wherein,
Dispensing unit 21; Be used for defining and let time and non-selling the time in the TD-LTE system; Wherein, The time of selling does the end for the TD-SCDMA system and makes an uproar and measure and DwPTS time of the corresponding TD-LTE system of cycle institute of calibration, non-ly sells the time for except that the time of selling, being used for the DwPTS time of TD-LTE system use;
Scheduling unit 22 is used for selling in the time the non-of every field, bearer service data on all the OFDM symbols in the DwPTS of TD-LTE system.
Based on technique scheme, consult shown in Figure 3, in the embodiment of the invention, following to the detailed process that carries out sub-frame configuration among the bimodulus RRU:
Step 300: in the TD-LTE system, define and let time and non-selling the time.
In the TD-LTE system, define and let time and non-selling the time, wherein, above-mentioned sell the time for the TD-SCDMA system do the end make an uproar measure and cycle of calibration DwPTS time of corresponding TD-LTE system; The above-mentioned non-time of selling is except that the time of selling, to be used for the DwPTS time that the TD-LTE system uses.
Preferably, being sold the time by the conduct of the time between 7 microseconds behind last OFDM sign-on to last OFDM symbol in this DwPTS sold by the TD-LTE system.Like this; Selling in the time of TD-LTE; Last OFDM sign-on place in DwPTS transfers transmitting uplink data to by downlink data transmission, can make an uproar and measures or the alignment time is sold time of about 81 microseconds for the end of TD-SCDMA system, guarantees the performance of system conscientiously.
Step 310: sell in the time bearer service data on all the OFDM symbols in the DwPTS of TD-LTE system the non-of every field.
Consulting shown in Figure 4ly, is example with the configuration 6 of TD-LTE system, and the 8th OFDM symbol among the figure is used for pilot signal transmitted, and last OFDM symbol of the DwPTS of above-mentioned TD-LTE system is the 9th OFDM symbol behind the 8th the OFDM symbol.
Consult shown in Figure 4ly, in the A stage: in every field, point arrives if the TD-SCDMA system receives the alignment time, and the TD-LTE system switches to transmitting uplink data at last OFDM sign-on place of this DwPTS by downlink data transmission.
At this moment; Last OFDM symbol and subsequent setting-up time of DwPTS sold by the TD-LTE system; In this sold the time, the TD-SCDMA system calibrated, at this moment; Because the time that the TD-SCDMA system calibrates has been sold by the TD-LTE system, so the uplink and downlink timeslot of TD-LTE system and TD-SCDMA system does not conflict.
Consult shown in Figure 4ly, in the B stage: in every field, if make an uproar Measuring Time point arrival at the bottom of the TD-SCDMA system, then the TD-LTE system switches to transmitting uplink data at last OFDM sign-on place of said DwPTS by downlink data transmission.
At this moment; Last OFDM symbol and subsequent setting-up time of DwPTS sold by the TD-LTE system; In this sold the time, the TD-SCDMA system carried out the end measurement of making an uproar, at this moment; Carry out time of making an uproar and measuring in the end because the TD-SCDMA system has been sold by the TD-LTE system, so the uplink and downlink timeslot of TD-LTE system and TD-SCDMA system do not conflict.
In the embodiment of the invention, can the access at random of TD-SCDMA system be transferred on the conventional ascending time slot and carry out, measure and not carry out, further improve the throughput of TD-LTE system so make an uproar in the above-mentioned end.
Consult shown in Figure 4; In the C stage: in every field; When the TD-LTE system sends the time point arrival of calibration cycle; The TD-LTE system uses last OFDM symbol of DwPTS to send calibrating sequence, and the setting-up time behind last OFDM symbol of this DwPTS switches to reception by transmission.Above-mentioned reception calibration can be calibrated not in the identical cycle with transmission, does not limit normal up reception here and still receives calibrating sequence.At C in the stage, the calibration cycle that the TD-LTE system sends and A in the stage TD-SCDMA system reception calibration cycle time point different, above-mentioned calibration cycle is respectively the calibration cycle of different system.
Consult shown in Figure 4, in the D stage: bearer service data on all the OFDM symbols in the DwPTS of TD-LTE system, and the setting-up time behind last OFDM symbol of DwPTS switches to transmitting uplink data by downlink data transmission.
Consulting Fig. 4 can know; After adopting technique scheme; Part DwPTS sells in the TD-LTE system, and the DwPTS of TD-LTE system and the UpPTS of TD-SCDMA system are not conflicted, and has kept the function of DwPTS bearing data service in the TD-LTE system simultaneously again to a certain extent.In in the present invention implements, can be made an uproar in the end and measure and the configuration of staggering of cycle alignment time, this method can avoid conflict.
Because being two kinds of standards, the operation principle of bimodulus RRU uses the homology clocks, i.e. TD-SCDMA system and TD-LTE system use homology clock, and therefore, put accurate and adjustable the switching time of uplink and downlink timeslot when technique scheme was applied among the bimodulus RRU sub-frame configuration.
For example; For the allocation plan under the prior art described in Fig. 1 with TD-SCDMA 5:2 and TD-LTE system ascending-descending subframes configuration 2 (3:1:1); After adopting technique scheme that the subframe of TD-LTE system is configured, can be adjusted into allocation plan as shown in Figure 5.Consult the TD-LTE system ascending-descending subframes allocation list shown in the table 2, following to the sub-frame configuration analysis of Fig. 5:
With calibration cycle is 1 hour 1 time, makes an uproar and be 100 milliseconds measuring period and add up the throughput of carrying out the adjusted TD-LTE of sub-frame configuration system 1 time in the end.Wherein, the TD-SCDMA system per hour receives calibration cycle 1 time in order to be unit with the field A stage; The B stage is for being unit with the field, the per 100 milliseconds of measurements of making an uproar at the bottom of carrying out 1 time of TD-SCDMA system; The C stage, the TD-LTE system per hour sent calibration cycle 1 time in order to be unit with the field; The D stage is for being unit with the field, except that A, B, C non-the selling the time the stage.The ratio of above-mentioned four periods is A:B:C:D=1:36000:1:683998=0.0000014:0.05:0.0000014:0.9499 97.This shows, use this flow process can significantly improve TD-LTE downstream bands utilization rate.In the cycle of every field, be example still with the configuration in the table 22, adopt technical scheme of the present invention after, DwPTS has increased by 6 OFDM symbols that can be used for bearing data service, can effectively improve the throughput of TD-LTE system, computing formula is:
Wherein, the OFDM symbolic number that conventional subframe can bearing data service is 11, and the OFDM symbolic number that special subframe configuration 6 can bearing data service is 6; 19/20 is meant that the time that per 100 milliseconds (promptly 20 field in) will spend 5 milliseconds (1 field) carries out UpPTS interferometry (being the measurement of making an uproar at the end).
Because technical scheme of the present invention can be transferred to the access at random of TD-SCDMA system on the conventional ascending time slot and carry out, measure and can not carry out so make an uproar in the above-mentioned end again, at this moment, the TD-LTE system can promote 18% throughput.
Consult table 3 be depicted as adopt technical scheme of the present invention after, be example with ascending-descending subframes configuration 0 ~ 6 in the table 2, the lifting capacity of TD-LTE throughput of system.
Table 3
| The ascending-descending subframes configuration | The throughput hoisting amount (is considered the end survey of making an uproar | The throughput hoisting amount (is not considered the end survey of making an uproar |
| 0 | （6/11）/1*19/20=52% | （6/11)/1=55% |
| 1 | （6/11）/2*19/20=26% | （6/11）/2=27% |
| 2 | （6/11）/3*19/20=17% | （6/11）/3=18% |
| 3 | （6/11）/6*19/10=8% | （6/11）/6=9% |
| 4 | （6/11）/7*19/10=7% | （6/11）/7=8% |
| 5 | （6/11）/8*19/10=6% | （6/11）/8*19/10=7% |
| 6 | （6/11）*2/3*19/20=35% | （6/11）*2/3=36% |
In the table 3,19/20 is meant that with field (5ms) be unit of measurement, has DwPTS among the 5ms (1 field) to sell among every 100ms (20 fields) to be used for TD-SCDMA to do the end measurement (as being the 5ms frame structure, correspondence table 2 configurations 0/1/2/6) of making an uproar; 9/10 is meant that with radio frames (10ms) be unit of measurement, has DwPTS among the 10ms (1 radio frames) to sell among every 100ms (10 radio frames) to be used for TD-SCDMA to do the end measurement (as being the 10ms frame structure, correspondence table 2 configurations 3/4/5) of making an uproar.Therefore, the throughput of system in descending sub frame ascending-descending subframes configuration format on the low side promotes very obvious, reaches as high as 55%.
After using technical scheme of the present invention, consult Fig. 5 and can know, the configuration 1 of TD-LTE system has only been sold part of O FDM symbol with configuration 6, can not conflict with the uplink and downlink timeslot of TD-SCDMA system.
In the embodiment of the invention; All be configured to example with TD-SCDMA 5:2; Last symbol of DwPTS and subsequent setting-up time are sold by the TD-LTE system, when adopting other TD-SCDMA and TD-LTE system configuration, also can be the OFDM symbols that the protection time slot is sold by the TD-LTE system.
In sum, in the embodiment of the invention, let time and non-selling the time through in the TD-LTE system, defining, selling in the time of every field, part of O FDM symbol is sold by the TD-LTE system, and TD-SCDMA utilizes this time of selling to calibrate or the end measurement of making an uproar; In every field; Non-the selling in the time except that the time of selling; Bearer service data on all OFDM symbols in the DwPTS of TD-LTE system; And the setting-up time behind last OFDM symbol of DwPTS switches to transmitting uplink data by downlink data transmission, adopts subframe and transmitting-receiving flow process in the aforesaid way configuration TD-LTE system, can be under the prerequisite of general measure that neither influences TD-SCDMA and performance; The data service function that as far as possible keeps the DwPTS of TD-LTE system, thus the TD-LTE throughput of system effectively improved.
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 (12)
1. a sub-frame configuration method that is applied among the bimodulus RRU is characterized in that, comprising:
In TD SDMA Long Term Evolution TD-LTE system, define and let time and non-selling the time; Wherein, The said time of selling is that TD SDMA TD-SCDMA system does the end and makes an uproar and measure and descending pilot frequency time slot DwPTS time of the corresponding TD-LTE system of cycle institute of calibration, saidly non-ly sells the time for except that the time of selling, being used for the DwPTS time of TD-LTE system use;
Sell in the time bearer service data on all the orthogonal frequency division multiplex OFDM symbols in the DwPTS of TD-LTE system the non-of every field.
2. the method for claim 1 is characterized in that, saidly sells in the time the non-of every field, further comprises:
Setting-up time behind last OFDM symbol of the DwPTS of said TD-LTE system switches to transmitting uplink data by downlink data transmission.
3. the method for claim 1 is characterized in that, said selling the time comprises:
Time between the setting-up time in the said DwPTS that the TD-LTE system sells behind last OFDM sign-on to last OFDM symbol.
4. like each described method of claim 1 to 3, it is characterized in that, further comprise:
Said non-selling in the time; If the TD-LTE system sends the time point of calibration cycle and arrives; Then the TD-LTE system uses last OFDM symbol of DwPTS to send calibrating sequence, and the setting-up time behind last OFDM symbol of said DwPTS switches to reception by transmission.
5. like each described method of claim 1 to 3, it is characterized in that, further comprise:
Sell in the time said, arrive if the TD-SCDMA system receives the time point of calibration cycle, then the TD-LTE system switches to transmitting uplink data at last OFDM symbol of said DwPTS by downlink data transmission.
6. like each described method of claim 1 to 3, it is characterized in that, further comprise:
Sell in the time said, if the time point of making an uproar measuring period at the bottom of the TD-SCDMA system arrives, then the TD-LTE system switches to transmitting uplink data at last OFDM symbol of said DwPTS by downlink data transmission.
7. a sub-frame configuration device that is applied among the bimodulus RRU is characterized in that, comprising:
Dispensing unit; Be used for defining and let time and non-selling the time in TD SDMA Long Term Evolution TD-LTE system; Wherein, The said time of selling is that TD SDMA TD-SCDMA system does the end and makes an uproar and measure and descending pilot frequency time slot DwPTS time of the corresponding TD-LTE system of cycle institute of calibration, saidly non-ly sells the time for except that the time of selling, being used for the DwPTS time of TD-LTE system use;
Scheduling unit is used for selling in the time the non-of every field, bearer service data on all the orthogonal frequency division multiplex OFDM symbols in the DwPTS of TD-LTE system.
8. device as claimed in claim 7 is characterized in that, said the non-of every field in the dispensing unit definition sold in the time, and scheduling unit also is used for:
Setting-up time behind last OFDM symbol of the DwPTS of said TD-LTE system switches to transmitting uplink data by downlink data transmission.
9. device as claimed in claim 7 is characterized in that, said dispensing unit defines and lets the time, comprising:
The time between the setting-up time behind last OFDM sign-on to last the OFDM symbol in the said DwPTS is sold by scheduling unit indication TD-LTE system.
10. like each described device of claim 7 to 9, it is characterized in that scheduling unit also is used for:
Said non-selling in the time; If the TD-LTE system sends the time point of calibration cycle and arrives; Then the TD-LTE system uses last OFDM symbol of DwPTS to send calibrating sequence, and the setting-up time behind last OFDM symbol of said DwPTS switches to reception by transmission.
11., it is characterized in that scheduling unit also is used for like each described device of claim 7 to 9:
Sell in the time said, arrive if the TD-SCDMA system receives the time point of calibration cycle, the TD-LTE system switches to transmitting uplink data at last OFDM symbol of said DwPTS by downlink data transmission.
12., it is characterized in that scheduling unit also is used for like each described device of claim 7 to 9:
Sell in the time said, if the time point of making an uproar measuring period at the bottom of the TD-SCDMA system arrives, then the TD-LTE system switches to transmitting uplink data at last OFDM symbol of said DwPTS by downlink data transmission.
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| CN103281139A (en) * | 2013-05-10 | 2013-09-04 | 大唐移动通信设备有限公司 | Method and system for detecting output power of dual-mode RRU (remote radio unit) equipment |
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| CN111654297A (en) * | 2017-08-30 | 2020-09-11 | 华为技术有限公司 | Dynamic time adjustment method, device and system |
| US11025362B2 (en) | 2017-08-30 | 2021-06-01 | Huawei Technologies Co., Ltd. | Dynamic time adjustment method, apparatus, and system |
| CN111654297B (en) * | 2017-08-30 | 2021-10-15 | 华为技术有限公司 | Dynamic time adjustment method, device and system |
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