CN101162987B - Method of transmitting uplink special time slot of TDD system - Google Patents
Method of transmitting uplink special time slot of TDD system Download PDFInfo
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- CN101162987B CN101162987B CN2007101699776A CN200710169977A CN101162987B CN 101162987 B CN101162987 B CN 101162987B CN 2007101699776 A CN2007101699776 A CN 2007101699776A CN 200710169977 A CN200710169977 A CN 200710169977A CN 101162987 B CN101162987 B CN 101162987B
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Abstract
The invention discloses a transmission method of pilot signals in the uplink specific time slot of a time division duplex system, which is used in the TDD (Time Division Duplex) model of a LTE (Longtime Evolution) system. The method includes three steps. Firstly, a terminal transmits random access channels, uplink data and one or multiple pilot signals on the uplink specific time slot, and wherein, the terminal transmits the pilot signals on the last OFDM (Orthogonal Frequency Division Multiplexing) symbol; secondly, when the pilot signals on the last OFDM symbol are data demodulation pilots, if channel measurement pilots still need to be transmitted, then the channel measurement pilots are transmitted on other symbols; thirdly, when the pilot signals on the last OFDM symbol are channel measurement pilots, if the channel measurement pilots are not used for data demodulation, then data demodulation pilots are transmitted on the last but one symbol; different pilot signals are not on the same symbol. The application of the pilot transmission method put forward by the invention can ensure the performance of uplink pilot time slots and can be compatible with other transmission methods of uplink pilots.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to the sending method of pilot signal in a kind of tdd systems uplink special time slot.
Background technology
The frame structure of present LTE (Long Term Evolution) system TDD (time division duplex) model, as shown in Figure 1.In this frame structure, the radio frames of a 10ms is divided into two fields, comprise in each field that 10 length are the time slot of 0.5ms (numbering from 0 to 9), per two time slots are formed the subframe that length is 1ms, comprise 5 subframes (numbering from 0 to 4) in the field.For length be 5.21us and 4.69us short Cyclic Prefix (Cyclic Prefix, CP), comprise 7 length in time slot and be 66.7us on/descending symbol, wherein the CP length of first symbol is 5.21us, the CP length of all the other 6 symbols is 4.69us; For length is the long CP of 16.67us, comprises in the time slot on 6/descending symbol.In addition, in this frame structure, the configuration characteristics of subframe are:
(1) subframe #0 is fixed for downlink transfer;
(2) subframe #1 is a special subframe; wherein comprising 3 special time slots, is respectively descending special time slot DwPTS (Downlink Pilot Time Slot), protection GP (Guard Period) and uplink special time slot UpPTS (Uplink Pilot Time Slot) at interval.Wherein:
(21) DwPTS is used for downlink transfer, a wherein minimum descending OFDM (OFDM) symbol is used to transmit master sync signal P-SCH (Primary-Synchronization CHannel), when comprising a plurality of OFDM symbol among the DwPTS, P-SCH is placed on first OFDM symbol (as shown in Figure 1);
(22) GP is a guard time, does not transmit any data;
(23) UpPTS is used for uplink, wherein comprises 2 up SC-FDMA (single carrier frequency division is multiplexing) symbol at least and is used for transmitting physical random access channel PRACH (Physical Random Access CHannel).The symbolic number that comprises as UpPTS is greater than 2 the time, and PRACH is placed on transmission (as shown in Figure 1) on preceding two symbols.
In frame structure, for with TD-SCDMA (TD SDMA) coexistence of systems, the OFDM symbol quantity that is comprised among the uplink special time slot UpPTS is variable, and, at least comprise 2 up SC-FDMA symbols and be used to transmit PRACH, this just makes that the structure of the structure of uplink special time slot and other general ascending time slots is inconsistent.
Summary of the invention
The technical problem to be solved in the present invention provides the sending method of pilot signal in a kind of tdd systems uplink special time slot.
The technical solution used in the present invention is:
The sending method of pilot tone in a kind of tdd systems uplink special time slot is applied to may further comprise the steps in the LTE system TDD model:
Terminal sends Random Access Channel, upstream data and one or more pilot signal on a uplink special time slot, wherein, described terminal is pilot signal transmitted on OFDM symbol in the end; When the pilot signal on described last OFDM symbol is the data demodulates pilot tone,, then on other symbols, send if also want the transmitting channel measurement pilot frequency; When the pilot signal on described last OFDM symbol is channel measurement pilot frequency,, then on the penult symbol, send described data demodulates pilot tone if channel measurement pilot frequency need not be done the data demodulation; Different pilot signals is not on same symbol.
Further, described terminal also sends the second data demodulates pilot tone on other any one symbol of described uplink special time slot.
Further, when the symbolic number that comprises in the described uplink special time slot during smaller or equal to m, described terminal does not send the second data demodulates pilot tone; Otherwise described terminal sends the described second data demodulates pilot tone on described uplink special time slot, wherein, and m=4,5,6.
Further, when the symbolic number that comprises in the described uplink special time slot during greater than m, described terminal sends the described second data demodulates pilot tone on the 3rd symbol of described uplink special time slot, wherein, and m=4,5,6.
Further, the symbolic number that comprises in the described uplink special time slot is greater than m and when adopting extended cyclic prefix, and described terminal sends the described second data demodulates pilot tone on m symbol of inverse of described uplink special time slot, wherein, and m=5,6.
Further, the symbolic number that comprises in the described uplink special time slot is greater than m and when adopting the regular circulation prefix, and described terminal sends the described second data demodulates pilot tone on m+1 symbol of inverse of described uplink special time slot, wherein, and m=5,6.
Adopt pilot sending method of the present invention can well guarantee the performance of uplink pilot time slot, simultaneously also can well with the sending method compatibility of other ascending pilot frequencies.
Description of drawings
Fig. 1 is the frame structure schematic diagram of TDD system in the prior art;
Fig. 2 is the position view of pilot tone in a kind of uplink pilot time slot among the embodiment;
Fig. 3 is the position view of pilot tone in the another kind of uplink pilot time slot among the embodiment;
Fig. 4 is the position view of pilot tone in the another kind of uplink pilot time slot among the embodiment.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
The sending method of pilot signal in a kind of tdd systems uplink special time slot, be applied in the LTE system TDD model, may further comprise the steps: terminal sends Random Access Channel, upstream data and one or more pilot signal on a uplink special time slot, wherein, terminal pilot signal transmitted on OFDM symbol in the end; When the pilot signal on last OFDM symbol is the data demodulates pilot tone,, then on other symbols, send if also want the transmitting channel measurement pilot frequency; When the pilot signal on last OFDM symbol is channel measurement pilot frequency,, then on the penult symbol, send the data demodulates pilot tone if channel measurement pilot frequency need not be done the data demodulation; Different pilot signals is not on same symbol.Terminal also sends the second data demodulates pilot tone on other any one symbol of uplink special time slot or when the symbolic number that comprises in the uplink special time slot during smaller or equal to m, terminal does not send the second data demodulates pilot tone; Otherwise terminal sends second data demodulation pilot frequency on uplink special time slot, and sending method comprises following three kinds of modes:
First mode: when the symbolic number that comprises in the uplink special time slot during greater than m, described terminal sends the described second data demodulates pilot tone on the 3rd symbol of described uplink special time slot, wherein, and m=4,5,6.
The second way: the symbolic number that comprises in the described uplink special time slot is greater than m and when adopting extended cyclic prefix, and described terminal sends the described second data demodulates pilot tone on m symbol of inverse of described uplink special time slot, wherein, and m=5,6.
The third mode: the symbolic number that comprises in the described uplink special time slot is greater than m and when adopting the regular circulation prefix, and described terminal sends the described second data demodulates pilot tone on m+1 symbol of inverse of described uplink special time slot, wherein, and m=5,6.
At above-mentioned frame structure, terminal sends a pilot tone on last OFDM symbol of uplink special time slot, and this pilot tone can be the data demodulates pilot tone, also can be sounding (channel measurement) pilot tone; And, when the symbolic number that comprises in the uplink special time slot more than 2 the time, can send another data demodulates pilot tone, send on the symbol that this pilot tone can be fixed in uplink special time slot, for example, when the symbolic number that is comprised in the uplink special time slot does not send the second data demodulates pilot tone smaller or equal to 5 the time, when the symbolic number that is comprised in the uplink special time slot greater than 5 the time, be fixed on and send the second data demodulates pilot tone on the 3rd symbol; This second data demodulates pilot tone also can change according to the symbolic number that is comprised in the uplink special time slot is different, for example: when the symbolic number that is comprised in the uplink special time slot does not send the second data demodulates pilot tone less than 5 the time, when the symbolic number that is comprised in the uplink special time slot greater than 5 the time, when the regular circulation prefix, send on the 6th symbol reciprocal, when extended cyclic prefix, send on the 5th symbol reciprocal.
Perhaps, data demodulates pilot tone at uplink special time slot also can send on penult OFDM symbol, the sounding pilot tone can in the end send on an OFDM symbol, also can not send the sounding pilot tone, send on the symbol that the second data demodulates pilot tone can be fixed in uplink special time slot, for example, when the symbolic number that is comprised in the uplink special time slot does not send the second data demodulates pilot tone less than 6 the time, when the symbolic number that is comprised in the uplink special time slot greater than 6 the time, be fixed on and send the second data demodulates pilot tone on the 3rd symbol; This second data demodulates pilot tone also can change according to the symbolic number that is comprised in the uplink special time slot is different, for example: when the symbolic number that is comprised in the uplink special time slot does not send the second data demodulates pilot tone less than 6 the time, when the symbolic number that is comprised in the uplink special time slot greater than 6 the time, when the regular circulation prefix, send on the 7th symbol reciprocal, when extended cyclic prefix, on the 6th symbol reciprocal, send.
Further be illustrated with an application example of the present invention below.
Accompanying drawing 2 is pilot tone position view in uplink special time slot in a kind of frame structure.Wherein, k is the numbering of each symbol.In this schematic diagram, the position of pilot tone in continuous 12 subcarriers has been described, wherein, the OFDM symbol quantity that uplink special time slot comprised is 11, data demodulates pilot tone or sounding pilot tone are fixed on last OFDM symbol and send, and the second data demodulates pilot tone is fixed on the 6th OFDM symbol reciprocal and sends.
Accompanying drawing 3 is pilot tone position view in uplink special time slot in the another kind of frame structure.Wherein, k is the numbering of each symbol.In this schematic diagram, the position of pilot tone in continuous 12 subcarriers has been described, wherein, the OFDM symbol quantity that uplink special time slot comprised is 11, the data demodulates pilot tone is fixed on the penult OFDM symbol and sends, and the second data demodulates pilot tone pilot tone is fixed on the 7th OFDM symbol reciprocal and sends.
Accompanying drawing 4 is pilot tone position view in uplink special time slot in another frame structure.Wherein, k is the numbering of each symbol.In this schematic diagram, the position of pilot tone in continuous 12 subcarriers has been described, wherein, the OFDM symbol quantity that uplink special time slot comprised is 10, data demodulates pilot tone or sounding pilot tone are fixed on last the OFDM symbol and send, and the second data demodulates pilot tone is fixed on the 6th OFDM symbol reciprocal and sends.
Need to prove that the frequency domain position unanimity of the frequency domain position of pilot tone and corresponding data adopts the mode of frequency division multiplexing between each user's pilot tone, mode that each antenna pilot adopts sign indicating number to divide during many antennas of user is multiplexing.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (6)
1. the sending method of pilot signal in the tdd systems uplink special time slot is applied to it is characterized in that in the LTE system TDD model, may further comprise the steps:
Terminal sends Random Access Channel, upstream data and one or more pilot signal on a uplink special time slot, wherein, described terminal is pilot signal transmitted on OFDM symbol in the end; When the pilot signal on described last OFDM symbol is the data demodulates pilot tone,, then on other symbols, send if also want the transmitting channel measurement pilot frequency; When the pilot signal on described last OFDM symbol is channel measurement pilot frequency,, then on the penult symbol, send described data demodulates pilot tone if channel measurement pilot frequency need not be done the data demodulation; Different pilot signals is not on same symbol.
2. the method for claim 1 is characterized in that,
Described terminal also sends the second data demodulates pilot tone on other any one symbol of described uplink special time slot.
3. the method for claim 1 is characterized in that,
When the symbolic number that comprises in the described uplink special time slot during smaller or equal to m, described terminal does not send the second data demodulates pilot tone; Otherwise described terminal sends the described second data demodulates pilot tone on described uplink special time slot, wherein, and m=4,5,6.
4. method as claimed in claim 3 is characterized in that,
When the symbolic number that comprises in the described uplink special time slot during greater than m, described terminal sends the described second data demodulates pilot tone on the 3rd symbol of described uplink special time slot, wherein, and m=4,5,6.
5. method as claimed in claim 3 is characterized in that,
The symbolic number that comprises in the described uplink special time slot is greater than m and when adopting extended cyclic prefix, and described terminal sends the described second data demodulates pilot tone on m symbol of inverse of described uplink special time slot, wherein, and m=5,6.
6. method as claimed in claim 3 is characterized in that,
The symbolic number that comprises in the described uplink special time slot is greater than m and when adopting the regular circulation prefix, and described terminal sends the described second data demodulates pilot tone on m+1 symbol of inverse of described uplink special time slot, wherein, and m=5,6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101699776A CN101162987B (en) | 2007-11-10 | 2007-11-10 | Method of transmitting uplink special time slot of TDD system |
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| CN2007101699776A CN101162987B (en) | 2007-11-10 | 2007-11-10 | Method of transmitting uplink special time slot of TDD system |
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| CN101162987A CN101162987A (en) | 2008-04-16 |
| CN101162987B true CN101162987B (en) | 2011-06-22 |
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101568184B (en) * | 2008-04-25 | 2012-01-04 | 电信科学技术研究院 | Method and device for detecting channel quality |
| CN101568165B (en) * | 2008-04-25 | 2011-11-16 | 电信科学技术研究院 | Method, system and device for processing uplink signals |
| US8503420B2 (en) | 2008-12-31 | 2013-08-06 | Mediatek Inc. | Physical structure and design of sounding channel in OFDMA systems |
| US8811300B2 (en) * | 2008-12-31 | 2014-08-19 | Mediatek Inc. | Physical structure and sequence design of midamble in OFDMA systems |
| CN101841354B (en) * | 2009-03-17 | 2014-02-12 | 电信科学技术研究院 | Method and device for transmitting downlink measurement pilot frequency |
| CN101841828B (en) * | 2009-03-18 | 2014-07-16 | 中兴通讯股份有限公司南京分公司 | Method for sending channel measurement pilot frequency in LTE-A system |
| US8340041B2 (en) * | 2009-07-02 | 2012-12-25 | Lg Electronics Inc. | Method and apparatus for allocating ranging channel in wireless communication system |
| CN101997809B (en) * | 2009-08-18 | 2013-09-11 | 中兴通讯股份有限公司 | Channel measured pilot frequency transmitting method and system |
| CN102055517A (en) * | 2009-11-02 | 2011-05-11 | 中兴通讯股份有限公司 | Mapping method of reference signal and base station adopted in mapping method |
| CN102055707B (en) * | 2009-11-02 | 2015-01-28 | 中兴通讯股份有限公司 | Mapping method and device of channel state information-reference signal (CSI-RS) |
| CN102118867A (en) * | 2009-12-31 | 2011-07-06 | 电信科学技术研究院 | Measurement pilot transmission method and device |
| CN102215198A (en) * | 2010-04-09 | 2011-10-12 | 中兴通讯股份有限公司 | Orthogonal method and device of channel measurement pilot frequencies in different cells |
| CN102685890B (en) | 2011-03-08 | 2017-11-14 | 中兴通讯股份有限公司 | The sending method and system of a kind of pilot tone |
| CN102325103A (en) * | 2011-09-01 | 2012-01-18 | 北京交通大学 | Reference signal designing method and system for LTE-A (Long Term Evolution-Advanced) system expansion CP (Content Provider) |
| CN105430672A (en) * | 2015-10-27 | 2016-03-23 | 东莞酷派软件技术有限公司 | Method for pilot design and base station |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1878031A (en) * | 2005-06-09 | 2006-12-13 | 大唐移动通信设备有限公司 | Communication method for time-division duplex mobile communication system |
| CN1913418A (en) * | 2005-08-08 | 2007-02-14 | 大唐移动通信设备有限公司 | Method for supporting changable cover by time division duplex system |
| CN101005308A (en) * | 2006-01-17 | 2007-07-25 | 上海原动力通信科技有限公司 | Physical layer random access method for broad band time division duplex mobile communication system |
-
2007
- 2007-11-10 CN CN2007101699776A patent/CN101162987B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1878031A (en) * | 2005-06-09 | 2006-12-13 | 大唐移动通信设备有限公司 | Communication method for time-division duplex mobile communication system |
| CN1913418A (en) * | 2005-08-08 | 2007-02-14 | 大唐移动通信设备有限公司 | Method for supporting changable cover by time division duplex system |
| CN101005308A (en) * | 2006-01-17 | 2007-07-25 | 上海原动力通信科技有限公司 | Physical layer random access method for broad band time division duplex mobile communication system |
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