CN101425842B - Transmission method and apparatus for control and management data - Google Patents
Transmission method and apparatus for control and management data Download PDFInfo
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- CN101425842B CN101425842B CN200710176796A CN200710176796A CN101425842B CN 101425842 B CN101425842 B CN 101425842B CN 200710176796 A CN200710176796 A CN 200710176796A CN 200710176796 A CN200710176796 A CN 200710176796A CN 101425842 B CN101425842 B CN 101425842B
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Abstract
The invention discloses a method and a device for the transmission of control management (CM) data. The residual space in a time slot chip after the normal transmission of in-phase quadrature (IQ) data is used for CM data transmission, and particularly the residual amount of an uplink pilot frequency time slot (UpPTS) and a TS1 time slot and/or the residual amount of a TS0 and a downlink pilot frequency time slot (DwPTS) are used for the CM data transmission. The method and the device for the transmission of control management (CM) data can guarantee the normal IQ data transmission, support the MBMS property and provide a transmission channel with wider band width for the CM data.
Description
Technical field
The present invention relates to the transmission technology of control and management (CM) data, particularly relate to the transmission method and the device of CM data in TD SDMA (TD-SCDMA) the system extension agreement.
Background technology
TD-SCDMA is the standard of a kind of employing time division duplex (TDD) mode in three kinds of international standards of 3G GSM, and TD-SCDMA supports the transmission of up-downgoing non-symmetrical service, on spectrum utilization, has bigger flexibility.This system synthesis has adopted the advanced technology in the radio communications such as smart antenna, uplink synchronous, joint-detection and software radio, makes system have the higher performance and the availability of frequency spectrum.
A time division multiple access (TDMA) frame length of TD-SCDMA system-frame is 10ms, comprises two 5ms subframes, and the structure of two sub-frame is identical.Shown in Fig. 1 a, each subframe is that seven conventional time slots and three special time slots of 675us constitute by length, and three special time slots are respectively descending pilot frequency time slot DwPTS, UpPTS and protection GP at interval, and wherein, DwPTS is as the transmission of downlink synchronous signal; UpPTS is as up access at random; GP be the protection of downlink transfer when being transformed into uplink at interval.In seven conventional time slots, time slot 0 (TS0) and descending pilot frequency time slot are always distributed to down link (DL), are fixed as descending time slot; Uplink pilot time slot and time slot 1 (TS1) are always distributed to up link (UL), are fixed as ascending time slot; But all the other time slots all flexible configuration are the upstream or downstream time slot, and Fig. 1 b and Fig. 1 c have provided the example of symmetrical distribution and asymmetric distribution respectively.
Separate by transfer point between ascending time slot and the descending time slot, in the TD-SCDMA system, the subframe of each 5ms have two transfer point: UL to DL and DL to UL.Through disposing the number of uplink and downlink timeslot neatly, can make TD-SCDMA be applicable to the symmetric and asymmetric business model of up-downgoing.
For strengthening the overlay area of base station, the TD-SCDMA system has proposed remote technology, and baseband portion and radio frequency part are separated, and the middle optical fiber that adopts carries out the signal transmission.Generally, far-drawing system comprises remote equipment controller (REC, Remote Equipment Controller) and the several far-end equipment (RE, Remote Equipment) that is positioned at this locality, connects through a pair of optical fiber between REC and the RE.Zoom out agreement with the base band inphase quadrature (IQ, In-Phase/Quadrature) data and CM data are compiled frame, time-sharing multiplex carries out compound transmission, two optical fiber is supported the complex data of IQ data and CM transfer of data on the uplink and downlink direction respectively.Wherein, the CM data refer to Ether frame data etc.
In routine is used, because being fixed as, TS0 and DwPTS time slot carry out downlink transfer, UpPTS and TS1 time slot are fixed as and carry out uplink.In other words be exactly, TS0 and DwPTS are idle time slots corresponding to the uplink path, and UpPTS and TS1 time slot are idle time slots corresponding to the downlink transfer path.On the crack, there is not the demand of IQ transfer of data at one's leisure; Utilize this characteristics, in zooming out agreement, it is to utilize TS0 and DwPTS time slot as the independent transmission time of up CM data that a kind of method is arranged, and utilizes UpPTS and the TS1 time slot independent transmission time as descending CM data.
Like this, the CM transfer of data has been utilized the idle time slot independent transmission of up-downgoing path, does not take normal data slot, makes and in data slot, can transmit more baseband I Q business datum, improves power system capacity.But, when the TD-SCDMA agreement is supported the MBMS characteristic, need be to the descending data broadcasting that carries out full time slot; Like this; The restriction that UpPTS noted earlier and TS1 time slot can only be used for ascending time slot is cancelled, and time slot allocation in this case is as shown in Figure 2, and all time slots are descending time slot.At this moment, send, do not have idle time slot, therefore, can't realize utilizing idle time slot to carry out the transmission of descending CM data because downlink data is a full time slot.
In the prior art, also having another kind to zoom out protocol scheme, is that the CM data are distributed in each chip (chip) of each time slot, in each chip, takes out a part and transmits the CM data.Though this method is not subject to multimedia broadcast/group broadcast service (MBMS) characteristic,, therefore, can reduce the transmission capacity of IQ data in the unit interval because the output of CM data need take the transfer of data position among each chip of regular traffic time slot.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of transmission method and device of CM data, can be when guaranteeing the normal IQ transfer of data and supporting the MBMS characteristic, for the CM data provide bandwidth bigger transmission channel.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of transmission method of control and management CM data, comprising: with the remaining space transmission CM data after the transmission inphase quadrature IQ data in the time slot chip.
Wherein, said time slot is uplink pilot time slot UpPTS and TS1 time slot and/or TS0 time slot and descending pilot frequency time slot DwPTS.
In the such scheme, the triliteral transmission space of said IQ data occupancy; Accordingly, adopt the 3rd space that word is later transmission of each chip CM data.
Preferable, this method further comprises: keep in each chip the space of a word after the transmission IQ data; Accordingly, adopt the 4th space that word is later transmission of each chip CM data.
The present invention also provides a kind of transmitting device of CM data; Comprise transmission location confirmation unit and transmission unit, wherein, the transmission location confirmation unit; Be used for confirming the position of transmission CM data, and determined position is sent to transmission unit according to the capacity of time slot chip transmission IQ data; Transmission unit is used for transmission CM data on the determined position of transmission location confirmation unit.
CM data transmission method provided by the present invention and device; Utilize that the remaining space after the normal transmission IQ data transmits the CM data in the time slot chip; Particularly utilize the surplus of UpPTS and TS1 time slot and/or TS0 and DwPTS time slot to transmit the CM data; Made full use of in the TD-SCDMA protocol data frame UpPTS and TS1 time slot on the down direction, and the particularity of TS0 and DwPTS time slot on the up direction, the MBMS characteristic also taken into account simultaneously.
No matter the present invention is in the routine application or in the MBMS characteristic is used; All can be according to the transmission situation of IQ data in UpPTS and the TS1 time slot chip, definite and employing clear position is exported the CM data, so; Can not influence the transmission of each time slot IQ data under the various scenes; And then improved efficiency of transmission, and, the transmission channel of bigger bandwidth can be provided for the CM data.
Description of drawings
Fig. 1 a is the composition structural representation of TD-SCDMA subframe;
Fig. 1 b is the time slot sketch map of uplink and downlink timeslot symmetrical distribution in the TD-SCDMA subframe;
Fig. 1 c is the asymmetric distributed time slot sketch map of uplink and downlink timeslot in the TD-SCDMA subframe;
Time slot allocation sketch map when Fig. 2 supports the MBMS characteristic for TD-SCDMA;
Fig. 3 a is the sketch map of chip capacity under the 614.4Mbps speed;
Fig. 3 b is the sketch map of chip capacity under the 1.2288Gbps speed;
Fig. 3 c is the sketch map of chip capacity under the 2.4576Gbps speed;
Fig. 4 a is the sketch map of transfer of data among the next chip of 614.4Mbps speed of the present invention;
Fig. 4 b is the sketch map of transfer of data among the next chip of 1.2288Gbps speed of the present invention;
Fig. 4 c is the sketch map of transfer of data among the next chip of 2.4576Gbps speed of the present invention.
Embodiment
Basic thought of the present invention is: utilize in the time slot chip remaining space after the transmission IQ data to transmit the CM data.Here, said time slot is UpPTS and TS1 time slot and/or TS0 and DwPTS time slot.
Consider that when supporting the MBMS characteristic downlink data must send by full time slot, can not be the independent time slot of CM data allocations again, so must adopt IQ data and the compound volume frame scheme of CM data in business time-slot.Wherein, said business time-slot just is meant the conventional time slot in each subframe.
Usually, zooming out on the link of agreement, transfer of data is a base unit with the chip in the TD-SCDMA system-frame, and the frequency of each chip is 1.28MHz.Typically to zoom out agreement speed 614.4Mbps, 1.2288Gbps and 2.4576Gbps is example, and the transmission capacity of each chip is respectively 384bits, 768bits and 1536bits.
Fig. 3 a～3c by each chip under the various speed ability data carried by data capacity, abscissa is word (word) number that takies among Fig. 3 a～3c, ordinate is several for taking bit (bit).Specifically, under the agreement speed 614.4Mbps, the transmission of each chip takies maximum 12 words, and each data accounts for 32bit at most, shown in Fig. 3 a; Under the agreement speed 1.2288Gbps, the transmission of each chip takies maximum 24 words, and each data accounts for 32bit at most, shown in Fig. 3 b; Under the agreement speed 2.4576Gbps, it is at most 48 words that the transmission of each chip takies, and each data accounts for 32bit at most, shown in Fig. 3 c.Among Fig. 3, each row can be regarded a data passages as.
Suppose that under the MBMS characteristic data volume of each chip downlink broadcast IQ data is n carrier wave antenna (CA, Carrier Antenna), CA is carrier wave data carried by data amount on an antenna.According to the situation of IQ data-measuring among the TD-SCDMA, the Breadth Maximum of each I and Q data is respectively 16bit, that is to say that IQ data take 32bit at most.So under the MBMS characteristic, the nCA data maximum of each chip takies the transmission capacity of 32nbit, the i.e. transmission capacity of n word.
Under the MBMS characteristic; Descending full time slot sends; Each chip data carried by data amount of each time slot is n CA, and comprehensive various application scenarioss are owing to there are the IQ data of nCA at most on UpPTS and the TS1 time slot; And for the various agreement speed that typically zoom out, transmission capacity is all greater than the transmission demand of IQ data under the MBMS characteristic.Therefore, the present invention utilizes UpPTS and the TS1 time slot little characteristics of IQ data volume under the MBMS characteristic, makes full use of the redundant space of transmission channel, and the remaining space after UpPTS and the TS1 slot transmission IQ data is used for carrying out the transmission of CM data.
Simultaneously, in each chip structure, also can reserve a word, as transmission of Information such as device synchronization.Therefore; Among each chip in UpPTS and TS1 time slot; Except n word being used for the MBMS characteristic and reservation one word, remaining space all can be used for transmitting the CM data, and is concrete; The heap(ed) capacity that can be used as transmission CM data is: under the agreement speed 614.4Mbps, and the * 32bit of the heap(ed) capacity of CM data=(12-n-1); Under the agreement speed 1.2288Gbps, the * 32bit of the heap(ed) capacity of CM data=(24-n-1); Under the agreement speed 2.4576Gbps, the * 32bit of the heap(ed) capacity of CM data=(48-n-1).
Can find out that under variety of protocol speed, the maximum transfer capacity of the MBMS characteristic that can support has certain restriction, under the agreement speed 614.4Mbps, n＜11; Under the agreement speed 1.2288Gbps, n＜23; Under the agreement speed 2.4576Gbps, n＜47.
With the IQ data volume is that three CA are that n=3 is an example, and UpPTS and TS1 go up the IQ data that each chip has 96bit at most, takies the data channel position of three row in Fig. 3 a～3c chip, just corresponding 1 word of each CA among Fig. 3 a～3c.For guaranteeing system synchronization and later expanded application; Can also further keep in the chip the i.e. data channel of a word of a row 32bit, therefore, can utilize that each later column space of the 4th row carries out the transmission of CM data in each chip; Shown in Fig. 4 a～4c; The defeated IQ data of the biographies that Fig. 4 a～4c bend is filled, blank column keeps, the defeated CM data of the biographies that grid is filled.
Specifically, for the speed of 614.4Mbps, the capacity that UpPTS and each chip of TS1 time slot can be used for the CM transfer of data is 32*8=256bits, shown in Fig. 4 a; For the speed of 1.2288Gbps, the CM data capacity of UpPTS and each chip of TS1 time slot is 32*20=640bits, shown in Fig. 4 b; For the speed of 2.4576Gbps, the CM data capacity of UpPTS and each chip of TS1 time slot is 32*44=1408bits, shown in Fig. 4 c.
Further, comprise 1024 chip among the UpPTS of each subframe and the TS1, per second has 200 sub-frame, therefore, is operated in 614.4Mbps speed following time when zooming out agreement, and the transmission rate of descending CM data is 256*1024*200=52428800bps=50Mbps; Be operated in 1.2288Gbps speed following time, the transmission rate of descending CM data is 640*1024*200=131072000bps=125Mbps; Be operated in 2.4576Gbps speed following time, the transmission rate of descending CM data is 1408*1024*200=288358400bps=275Mbps.
If adopt subframe structure shown in Figure 1, on up direction, also can adopt similar method, the CM data are used the remaining space transmission of each chip in TS0 and the DwPTS time slot, such as: utilize the 5th Data Position that be listed as to transmit the CM data.Comprise 960 chip among TS0 and the DwPTS, adopt and to calculate up direction under 611.44Mbps or 1.2288Gbps or 2.4576Gb that up CM transmission rate is respectively 46.9Mbps, 117.2Mbps, 257.8Mbps with quadrat method.
This shows that this method is that up-downgoing CM passage provides enough bandwidth, and can take into account the MBMS characteristic and use that the CM transfer of data does not influence the volume of business of normal time slot with conventional.
For realizing said method; The present invention also provides a kind of transmitting device of CM data; Comprise transmission location confirmation unit and transmission unit; Wherein, the transmission location confirmation unit is used for confirming according to the capacity of time slot chip transmission IQ data the position of transmission CM data, and determined position is sent to transmission unit; Transmission unit is used for transmission CM data on the determined position of transmission location confirmation unit, such as: utilize the 4th each later column space of word of each chip to carry out the transmission of CM data.Wherein, said time slot is UpPTS and TS1 time slot, is used to transmit descending CM data; And/or be TS0 and DwPTS time slot, be used to transmit up CM data.
In practical application, the present invention also can expand on other time slots beyond TS0, the TS1 and realize that the above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (6)
1. the transmission method of control and management CM data; It is characterized in that; This method comprises: quantity and carrier wave data carried by data amount on an antenna according to the carrier wave antenna are confirmed the shared transmission space of IQ data in each time slot chip; And and then confirm to transmit the CM data with the remaining space after the transmission inphase quadrature IQ data in the time slot chip by the remaining space after the transmission IQ data in each time slot chip.
2. method according to claim 1 is characterized in that, said time slot is uplink pilot time slot UpPTS and TS1 time slot and/or TS0 time slot and descending pilot frequency time slot DwPTS.
3. method according to claim 1 and 2 is characterized in that, the transmission space of n word before the said IQ data occupancy; Accordingly, adopt the later space transmission CM data of n word of each chip.
4. method according to claim 1 and 2 is characterized in that, the transmission space of n word before the said IQ data occupancy keeps the space of transmitting a word after the IQ data in each chip; Accordingly, adopt the later space transmission CM data of n+1 word of each chip.
5. the transmitting device of CM data is characterized in that, this device comprises transmission location confirmation unit and transmission unit, wherein,
The transmission location confirmation unit is used for the position according to the definite transmission of the capacity CM data of each time slot chip transmission IQ data, and determined position is sent to transmission unit;
Transmission unit is used for transmission CM data on the determined position of transmission location confirmation unit.
6. device according to claim 5 is characterized in that, said time slot is uplink pilot time slot UpPTS and TS1 time slot and/or TS0 time slot and descending pilot frequency time slot DwPTS.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859661A (en) * | 2006-02-27 | 2006-11-08 | 华为技术有限公司 | Method for transmitting multiple system radio service IQ data by general public radio interface |
| CN1859396A (en) * | 2006-02-06 | 2006-11-08 | 华为技术有限公司 | Method for transmitting multiple system radio service data by general radio interface |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859396A (en) * | 2006-02-06 | 2006-11-08 | 华为技术有限公司 | Method for transmitting multiple system radio service data by general radio interface |
| CN1859661A (en) * | 2006-02-27 | 2006-11-08 | 华为技术有限公司 | Method for transmitting multiple system radio service IQ data by general public radio interface |
| EP1827035A1 (en) * | 2006-02-27 | 2007-08-29 | Huawei Technologies Co., Ltd. | Method for transmitting service data for various radio access technologies via common public radio interface |
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