CN101197803B - Method, device and system for data transmission in TDD system - Google Patents
Method, device and system for data transmission in TDD system Download PDFInfo
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- CN101197803B CN101197803B CN2006101606796A CN200610160679A CN101197803B CN 101197803 B CN101197803 B CN 101197803B CN 2006101606796 A CN2006101606796 A CN 2006101606796A CN 200610160679 A CN200610160679 A CN 200610160679A CN 101197803 B CN101197803 B CN 101197803B
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Abstract
The invention discloses a data transmitting method, a device and a system in a time division duplex system, which is used to solve the problem in the prior art that downlink data among adjacent cells interfere to uplink data; the method comprises that: a blanket channel of a whole cell or a high-power transmit channel is mapped to OFDM symbols of a downlink time slot in a transmit frame, a guard interval in the transmit frame and the OFDM symbol on a time domain space OFDM symbols which are not mapped to any of the blank channel of the whole cell and the high-power transmit channel; an uplink control channel is mapped to OFDM symbols of an uplink time slot in the transmit frame, the guard interval and the OFDM symbols for mapping the uplink control channel on the time domain space OFDM symbols which are not mapped to uplink control channel; the OFDM symbols of the transmit frame are transmitted; the invention is adopted to avoid the interference between the downlink data and the uplink data among the adjacent cells.
Description
Technical field
The present invention relates to moving communicating field, send method, the Apparatus and system of data in particularly a kind of tdd systems.
Background technology
Time division duplex (TDD, Time Division Duplex) pattern is a kind of pattern of carrying out wireless transmission in wireless channel, is to realize by repeating time division multiple access (TDMA, Time DivisionMultiple Access) frame structure in the time domain periodically.Under tdd mode, transmit and receive is that timesharing is carried out, make that based on the wireless transmission method of tdd mode the up-downgoing channel can time division multiplexing, and the great advantage of this pattern is that it can be operated on the frequency range that does not have image frequency, frequency range is required so strict unlike Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplex) pattern.Frame structure under the tdd mode is subdivided into several time slots, and the time slot allocation between Uplink/Downlink can be by a transfer point change flexibly, to satisfy different business needs.In the TDD wireless network transmissions, descending/as to need certain protection (GP, Guard Period) or be referred to as descending up change-over time (DUP, Downlink Uplink Period) at interval during up switching.
In the frame structure schematic diagram of 3GPP36.211 system as shown in Figure 1, the radio frames of 1 10ms is made up of the wireless sub-frame of 2 5ms, and each wireless sub-frame is made of 7 common time slots and 3 special time slots; Wherein, common time slot (Time Slot, TS0～TS6) is used for transmitting data, TS0 is regularly as descending time slot, the TS1 time slot is regularly as ascending time slot, and other common time slot TS2～TS6 can be configured to ascending time slot or descending time slot as required neatly to realize the transmission of asymmetric traffic; 3 special time slots are respectively descending pilot frequency time slot (DwPTS, Downlink Pilot Time Slot), uplink pilot time slot (UpPTS, Uplink Pilot Time Slot) and protection (GP, Guard Period) at interval; Descending pilot frequency time slot DwPTS before the GP of protection interval is used for the transmission of the down-going synchronous information of system; need full sub-district to cover; therefore can cause very big interference to the ascending time slot of the neighbor cell after the GP; in addition; uplink pilot time slot UpPTS after GP is used for initialization and inserts at random; because not obtaining uplink synchronous may shift to an earlier date a lot; therefore can further strengthen the distinctive neighbor cell of TDD system; two-layer sub-district; (survey by the field according to the TD-SCDMA system to the interference of the upstream data of this sub-district for the downlink data of the 3rd layer of sub-district or the 4th layer of sub-district; the 3rd layer of sub-district; also may there be the interference to the upstream data of this sub-district in the downlink data of the 4th layer of sub-district); UpPTS is the first step of user access network; directly influenced the user and whether can enjoy service by access network, therefore guaranteed that the accurate transmission of these information is prerequisites of cordless communication network operate as normal.
In the frame structure schematic diagram of 802.16e system as shown in Figure 2, control information except broadcast all sends in downlink burst DL burst, if this control information is at last OFDM (OFDM of descending time slot, Orthogonal Frequency Division Multiplex) sends on the symbol, and be that full power sends, can produce very large disturbance this moment to the upstream data of neighbor cell, in addition, the initial Initial of access ranging information just random access information first symbol in ascending time slot sends, and can be subjected to neighbor cell this moment, two-layer sub-district, the interference of the downlink data of the 3rd layer of sub-district or the 4th layer of sub-district.
By as can be seen above-mentioned, in the existing tdd systems, the downlink data that this sub-district is used for synchronizing channel, broadcast channel or control channel transmission sends on last OFDM symbol of descending time slot, up major control information sends at first symbol of ascending time slot, therefore the downstream signal between adjacent cell can't be avoided the interference of upward signal, thereby causes the data transmission efficiency of system and transmission reliability lower.
Summary of the invention
The invention provides the method that sends data in a kind of tdd systems, upward signal generation interference is caused the data transmission efficiency and the lower problem of transmission reliability of system in order to the downstream signal between adjacent cell in the solution existing system.
The invention provides following technical scheme:
Send the method for data in a kind of tdd systems, comprise step:
Full sub-district covering channel or high-power send channel are mapped on the OFDM symbol of descending time slot in the transmission frame, and the protection in the described transmission frame is not shone upon the OFDM symbol that full sub-district covers arbitrary channel in channel and the high-power send channel at interval with described OFDM symbol at interval on time domain;
Ascending control channel is mapped on the OFDM symbol of ascending time slot in the described transmission frame, and described protection at interval with the OFDM symbol of the mapping uplink control channel OFDM symbol of mapping uplink control channel not at interval on time domain;
Send the OFDM symbol of described transmission frame;
The protection that plays a protective role when wherein, described protection is descending time slot and ascending time slot conversion at interval at interval.
Send the method for data in a kind of tdd systems, be applied to 3GPP LTE long evolving system, comprise step:
Full sub-district covering channel or high-power send channel are mapped on the OFDM symbol of descending time slot in the transmission frame, and the protection in the described transmission frame is not shone upon the OFDM symbol that full sub-district covers arbitrary channel in channel and the high-power send channel at interval with described OFDM symbol at interval on time domain; Ascending control channel is mapped on the OFDM symbol of ascending time slot in the described transmission frame, and described protection at interval with the OFDM symbol of the mapping uplink control channel OFDM symbol of mapping uplink control channel not at interval on time domain;
Send the OFDM symbol of described transmission frame;
The protection that plays a protective role when wherein, described protection is descending time slot and ascending time slot conversion at interval at interval.
A kind of communication equipment comprises:
First map unit, be used for full sub-district is covered the OFDM symbol that channel or high-power send channel are mapped to the transmission frame descending time slot, and the protection in the described transmission frame is not shone upon the OFDM symbol that full sub-district covers arbitrary channel in channel and the high-power send channel at interval with described OFDM symbol at interval on time domain;
Second map unit is used for ascending control channel is mapped to the OFDM symbol of described transmission frame ascending time slot, and described protection at interval with the OFDM symbol of the mapping uplink control channel OFDM symbol of mapping uplink control channel not at interval on time domain;
Transmitting element is used to send the OFDM symbol of described transmission frame;
The protection that plays a protective role when wherein, described protection is descending time slot and ascending time slot conversion at interval at interval.
A kind of communication system comprises:
Terminal equipment is used to send upstream data and downlink data receiving;
The base station, be used to receive described upstream data and send described downlink data, wherein, in the downlink data transmission frame, full sub-district covering channel or high-power send channel are mapped on the OFDM symbol of descending time slot in the transmission frame, and the protection in the described transmission frame is not shone upon the OFDM symbol that full sub-district covers arbitrary channel in channel and the high-power send channel at interval with described OFDM symbol at interval on time domain; Ascending control channel is mapped on the OFDM symbol of ascending time slot in the described transmission frame, and described protection at interval with the OFDM symbol of the mapping uplink control channel OFDM symbol of mapping uplink control channel not at interval on time domain;
The protection that plays a protective role when wherein, described protection is descending time slot and ascending time slot conversion at interval at interval.
Beneficial effect of the present invention is as follows:
Among the present invention full sub-district covering channel or high-power send channel are mapped on the OFDM symbol of descending time slot in the transmission frame, and the OFDM symbol of arbitrary channel in covering of full sub-district and the high-power send channel is not shone upon in the protection in the described transmission frame at interval at interval on time domain with described OFDM symbol, adopt this mapping method, can avoid the downlink broadcast information of this cell base station transmission effectively and need of the interference of the Downlink Control Information of full sub-district covering the upstream data of contiguous outer sub-district transmission; Among the present invention ascending control channel is mapped on the OFDM symbol of ascending time slot in the described transmission frame; and the protection in the described transmission frame at interval with the OFDM symbol of the mapping uplink control information OFDM symbol of mapping uplink control channel not at interval on time domain; adopt this mapping method; can avoid the interference of contiguous outer cell base station downlink broadcast information that sends and the Downlink Control Information that needs full sub-district to cover effectively, also guarantee the correct transmission of up major control information simultaneously the upstream data of this community user transmission.
Description of drawings
Fig. 1 is the frame structure schematic diagram of 3GPP36.211 system in the prior art;
Fig. 2 is the frame structure schematic diagram of 802.16e system in the prior art;
Fig. 3 is a communication system architecture schematic diagram in the embodiment of the invention;
Fig. 4 is the realization flow figure that sends data in the embodiment of the invention;
Three sectorized cell system schematic in Fig. 5 embodiment of the invention;
Fig. 6 is a kind of structural representation of transmission frame in the embodiment of the invention;
Fig. 7-Figure 11 is the relation curve schematic diagram between unit bandwidth upper signal channel limit digit rate and the DUP;
Figure 12 is the another kind of structural representation of transmission frame in the embodiment of the invention.
Embodiment
In the downlink data transmission frame, full sub-district covered in the present embodiment channel or high-power control channel on time domain away from protection at interval, with ascending control channel on time domain also at interval away from protection, in addition, maximization also provides a kind of definite protection method at interval to present embodiment based on power system capacity; Full sub-district covering channel or powerful channel mainly comprise synchronizing channel, broadcast channel and down control channel etc. in the present embodiment; Ascending control channel mainly comprises random access control channel.
Below in conjunction with Figure of description technical solution of the present invention is elaborated.
Consult Fig. 3, a kind of communication system in the present embodiment comprises that terminal equipment 31 is used to send upstream data and downlink data receiving; Base station 30 is used to receive the upstream data that described terminal equipment 31 sends, and sends downlink data to described terminal equipment 31; Described base station 30 comprises first map unit 300, be used for full sub-district is covered the OFDM symbol that channel or high-power send channel are mapped to the transmission frame descending time slot, and the protection in the described transmission frame is not shone upon the OFDM symbol that full sub-district covers arbitrary channel in channel and the high-power send channel at interval with described OFDM symbol at interval on time domain, the number of the OFDM symbol at described interval is at least one; Second map unit 301, be used for ascending control channel is mapped to the OFDM symbol of described transmission frame ascending time slot, and described protection at interval with the OFDM symbol of the mapping uplink control channel OFDM symbol of mapping uplink control channel not at interval on time domain, the number of the OFDM symbol at described interval is at least one; Transmitting element 302 is used to send the OFDM symbol of described transmission frame; Receiving element 303 is used for the upstream data that receiving terminal apparatus 31 sends.
Consult Fig. 4, the realization flow that sends data in the present embodiment in tdd systems is as follows:
The OFDM symbol of step 402, the described transmission frame of transmission.
In the existing 802.16e system, descending time slot at the downlink data transmission frame may be mapped in last OFDM symbol with full sub-district covering channel or high-power send channel, at ascending time slot ascending control channel is mapped in first OFDM symbol, therefore, must be at interval on time domain at ascending time slot in the present embodiment away from protection with ascending control channel for the 802.16e system, simultaneously the descending time slot of downlink data transmission frame with full sub-district cover channel or high-power control channel on time domain away from protection at interval; In the existing 3GPPLTE system; descending time slot at the downlink data transmission frame is mapped in last OFDM symbol with full sub-district covering channel or high-power send channel; at ascending time slot ascending control channel is mapped in first OFDM symbol; therefore; separately will descending full sub-district cover channel or high-power send channel can be avoided the interference of downlink data to upstream data at interval away from protection on time domain for 3GPP LTE system in the present embodiment, simultaneously can be further with ascending control channel on the time domain away from protecting the interval to avoid downlink data between adjacent cell more effectively to the interference of upstream data.Therefore; avoid in the present embodiment between adjacent cell downlink data to the preferable implementation of the interference of upstream data be the descending time slot of downlink data transmission frame with full sub-district cover channel or high-power control channel on time domain away from protection at interval, simultaneously ascending time slot with ascending control channel on time domain away from protection at interval.
Consult three sectorized cell system schematic shown in Figure 5; suppose radius of society R=5km; base station transmitting power P=43dBm; cyclic prefix CP=5us; the effective transmission time T=1/15k=66.67us of OFDM symbol, descending up DUP=2R/C=33.5us change-over time (will protect in the present embodiment and be called DUP at interval).
Adopt the modified-Hata model, the computing formula of downlink path loss is as follows:
L(d)＝69.55+26.16logf-13.82log(h
te)+C
A+C
B+C
C+C
D+[44.9-6.55log(h
te)]log?d(1)
Wherein:
D is the distance between receipts machine and the transmitter;
F is a carrier frequency;
h
TeBe transmitter antenna height;
h
ReBe the receiver antenna height;
C
ABe the big city environment, the antenna gain of carrier frequency terminal equipment during greater than 300MHz is to the influence of path loss, and computing formula is: C
A=-3.2 (log 11.75h
Re)
2+ 4.97;
C
BBe the influence of regional population to path loss, computing formula is: C
B=-2 (log10 (f/28))
2-5.4;
C
CCarrier frequency is to the influence of path loss during greater than 900MHz for carrier frequency, and computing formula is:
C
C＝23log10(f/883)；
C
DBe the influence of earth curvature to path loss, computing formula is:
C
D＝0 d＜15km
C
D＝-29.96+30.38*log10(d)-26.26*(log10(d))
2+18.78*(log10(d))
3d＞15km；
Suppose base station antenna height h
Te=30m, carrier frequency f=2000MHz, h
Re=30m can obtain the base station by above-mentioned formula (1) and to the path loss model the base station is:
L(d)＝115.6+35.22logd d＜15km
L(d)＝85.64+65.6*log10(d)-26.26*(log10(d))
2+18.78*(log10(d))
3 d＞15km
Further determine cell capacity/bandwidth (being spectrum efficiency) according to the above-mentioned downlink path loss that obtains below, its computing formula is as follows:
Wherein:
E
ReBe received energy, computing formula is:
E
Re=received power * time=(transmitted power-path loss+receiver gain) * time;
I is total interfering energy, and computing formula is:
Adopt the system parameters shown in the table 1, can calculate cell capacity/bandwidth that radius of society is 5km by above-mentioned formula (2), as shown in table 2,
| Parameter | Value |
| Bandwidth W (MHz) | 5 |
| Thermal noise density (dBm/Hz) | -174 |
| Receiver noise factor (db) | 5 |
| Thermal noise power Pn (dBm) | -108.7 |
| Base station transmitting power (dBm) | 43 |
| Radius of society (km) | 5，4，3，2，1 |
| Receiver gain (dBi) | 14 |
Table 1
| The outer sub-district of n layer | Distance (km) between the base station | Path loss (dB) | An interference base station arrives the received power (dBm) of this base station | Propagation delay (us) | Effective interference time (us) | Capacity/broadband C/W |
| n＝1 | 8.66 | 148.6 | -91.6 | 28.9 | 0 | 1.176 |
| n＝2 | 17.32 | 162.3 | -105.3 | 57.7 | 19.2 | 0.765 |
| n＝3 | 25.98 | 179.1 | -122.1 | 86.6 | 49.1 | 0.736 |
| n＝4 | 34.64 | 192.9 | -135.9 | 115 | 74.5 | 0.733 |
| n＝5 | 43.3 | 204.9 | -147.9 | 144 | 103.5 | 0.733 |
Table 2
Distance when radius of society is 5km as can be seen from Table 2 between base station and the base station is very big, corresponding its path loss is also very big, therefore do not need substantially to consider that radius of society surpasses the base station of which floor outer sub-district of vicinity of 5km to the interference of the upward signal of this sub-district, when therefore considering in the present embodiment that radius of society is 1～5km, the outer sub-district of n layer is to the influence of this cell spectrum efficient, the data that calculate are as shown in table 3, wherein R is a radius of society, C/W is a spectrum efficiency, and n is the number of plies of outer sub-district;
Table 3
The outer sub-district of the vicinity that need consider of the different districts radius number of plies as can be seen from Table 3, be to deduct protection duration and Cyclic Prefix duration at interval the propagation delay time its corresponding effectively interference time, result of calculation is as shown in table 4:
| ? | The outer sub-district number of plies that needs consideration | Effective interference time (us) |
| R＝5km | 4 | 74.5 |
| R＝4km | 4 | 60.6 |
| R＝3km | 4 | 44.2 |
| R＝2km | 7 | 62.5 |
| R＝1km | 8 | 34.5 |
Table 4
With the synchronizing channel is example, and when DUP=2*R/C, the OFDM symbol that does not shine upon synchronizing channel in interval also can reduce interference time between the descending OFDM symbol of mapping synchronizing channel and the DUP, but can not avoid this interference effectively; When no matter radius of society is in 5km as can be seen from Table 4, the base station of considering outer sub-district is to being effective interference time of the upward signal of this sub-district 74.5us to the maximum, therefore shine upon between the descending OFDM symbol of synchronizing channel and the DUP at interval two OFDM symbols that do not shine upon synchronizing channel and can effectively avoid of the interference of down-going synchronous information the upstream data of contiguous outer sub-district, same, two OFDM symbols of mapping uplink control information not at interval between the upgoing O FDM symbol of mapping uplink control channel (as Random Access Channel) and the DUP can effectively be avoided the interference of the downlink data of contiguous outer sub-district to the ascending control information of this sub-district; OFDM symbol after the mapping at the interval schematic diagram on the time domain and between the DUP as shown in Figure 6.
The configuration of DUP has very big influence to power system capacity, if DUP is too small, causes power system capacity to descend thereby then can produce bigger interference; If DUP is excessive, then can waste bandwidth and time, the simultaneity factor capacity also can descend; Therefore need a suitable DUP and make the power system capacity maximization, provide a kind of in the present embodiment and determined the method for DUP, only consider of the influence of contiguous outer area interference this moment power system capacity according to system's heap(ed) capacity.
Capacity formula on the unit bandwidth is:
T wherein
1Be effective interference time, t
0Be the propagation delay of the outermost layer cell base station of consideration to this cell base station.
Can obtain can obtaining the relation between radius of society and the DUP thus by the emulation of matlab programing system as the unit bandwidth upper signal channel limit digit rate of Fig. 7-shown in Figure 11 and the graph of relation between the DUP, as shown in table 5:
| Radius of society R (km) | DUP(us) |
| R＝5km | 54 |
| R＝4km | 42 |
| R＝3km | 47 |
| R＝2km | 53.4 |
| R＝1km | 34 |
Table 5
Can draw by table 5, when the method for employing maximum capacity is determined DUP, the descending full sub-district of mapping cover between last OFDM symbol in the OFDM symbol of channel or high-power send channel and the DUP at interval one do not shine upon full sub-district cover with high-power send channel in the OFDM symbol of arbitrary channel can avoid the interference of Downlink Control Information and broadcast message to the ascending control information of adjacent cell, same, OFDM symbol of mapping uplink control information not at interval between first OFDM symbol in the OFDM symbol of mapping uplink control information (important information) and the DUP, can avoid the interference of the downlink data of adjacent cell to the ascending control information of this sub-district, the OFDM symbol after the mapping at the interval schematic diagram on the time domain and between the DUP as shown in figure 12.
At the down channel that can use the soft-frequency reuse technology, as Physical Random Access Channel (PRACH, Physical Random Access Channel) and synchronizing channel (SCH, Synchronization Channel) etc., can adopt the soft-frequency reuse technology to send the OFDM symbol that shines upon this kind channel in the present embodiment, to reduce of the interference of this cell downlink signal more effectively to outer cell uplink signal.
The present invention is applicable to the system of all time division duplexs, adopt the present invention can avoid this cell downlink signal effectively to the interference of the interference of adjacent cell upward signal and adjacent cell downstream signal to this cell uplink signal, and the reliability that has guaranteed to transmit up important control information, improved systematic function.
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, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (21)
1. send the method for data in the tdd systems, it is characterized in that, comprise step:
Full sub-district covering channel or high-power send channel are mapped on the OFDM symbol of descending time slot in the transmission frame, and the protection in the described transmission frame is not shone upon the OFDM symbol that full sub-district covers arbitrary channel in channel and the high-power send channel at interval with described OFDM symbol at interval on time domain;
Ascending control channel is mapped on the OFDM symbol of ascending time slot in the described transmission frame, and described protection at interval with the OFDM symbol of the mapping uplink control channel OFDM symbol of mapping uplink control channel not at interval on time domain;
Send the OFDM symbol of described transmission frame;
The protection that plays a protective role when wherein, described protection is descending time slot and ascending time slot conversion at interval at interval.
2. the method for claim 1 is characterized in that, described full sub-district covers channel or high-power send channel is a synchronizing channel, perhaps is broadcast channel, perhaps is down control channel.
3. method as claimed in claim 2 is characterized in that, described protection duration is at interval determined according to radius of society.
4. method as claimed in claim 3 is characterized in that, described protection duration at interval is 2 times the radius of society and the ratio of the light velocity.
5. method as claimed in claim 4; it is characterized in that the protection in the described transmission frame is at least two with the OFDM symbol that shines upon full sub-district covering channel or high-power send channel number that does not shine upon the OFDM symbol of arbitrary channel in full sub-district covering channel and the high-power send channel at interval on time domain at interval.
6. method as claimed in claim 4 is characterized in that, the protection interval in the described transmission frame is at least two with the number of OFDM symbol OFDM symbol of the not mapping uplink control channel at interval on time domain of mapping uplink control channel.
7. method as claimed in claim 2 is characterized in that, described protection duration is at interval determined according to system's heap(ed) capacity.
8. method as claimed in claim 7; it is characterized in that the protection in the described transmission frame is one with the OFDM symbol that shines upon full sub-district covering channel or high-power send channel number that does not shine upon the OFDM symbol of arbitrary channel in full sub-district covering channel and the high-power send channel at interval on time domain at interval.
9. method as claimed in claim 7 is characterized in that, the protection interval in the described transmission frame is one with the number of OFDM symbol OFDM symbol of the not mapping uplink control channel at interval on time domain of mapping uplink control channel.
10. send the method for data in the tdd systems, be applied to 3GPP LTE long evolving system, it is characterized in that, comprise step:
Full sub-district covering channel or high-power send channel are mapped on the OFDM symbol of descending time slot in the transmission frame, and the protection in the described transmission frame is not shone upon the OFDM symbol that full sub-district covers arbitrary channel in channel and the high-power send channel at interval with described OFDM symbol at interval on time domain; Ascending control channel is mapped on the OFDM symbol of ascending time slot in the described transmission frame, and described protection at interval with the OFDM symbol of the mapping uplink control channel OFDM symbol of mapping uplink control channel not at interval on time domain;
Send the OFDM symbol of described transmission frame;
The protection that plays a protective role when wherein, described protection is descending time slot and ascending time slot conversion at interval at interval.
11. method as claimed in claim 10 is characterized in that, described full sub-district covers channel or high-power send channel is a synchronizing channel, perhaps is broadcast channel, perhaps is down control channel.
12. method as claimed in claim 11 is characterized in that, described protection duration is at interval determined according to radius of society.
13. method as claimed in claim 12 is characterized in that, described protection duration at interval is 2 times the radius of society and the ratio of the light velocity.
14. method as claimed in claim 13; it is characterized in that the protection in the described transmission frame is at least two with the OFDM symbol that shines upon full sub-district covering channel or high-power send channel number that does not shine upon the OFDM symbol of arbitrary channel in full sub-district covering channel and the high-power send channel at interval on time domain at interval.
15. method as claimed in claim 14 is characterized in that, the protection interval in the described transmission frame is at least two with the number of OFDM symbol OFDM symbol of the not mapping uplink control channel at interval on time domain of mapping uplink control channel.
16. method as claimed in claim 11 is characterized in that, described protection duration is at interval determined according to system's heap(ed) capacity.
17. method as claimed in claim 16; it is characterized in that the protection in the described transmission frame is at least one with the OFDM symbol that shines upon full sub-district covering channel or high-power send channel number that does not shine upon the OFDM symbol of arbitrary channel in full sub-district covering channel and the high-power send channel at interval on time domain at interval.
18. method as claimed in claim 16 is characterized in that, the protection interval in the described transmission frame is at least one with the number of OFDM symbol OFDM symbol of the not mapping uplink control channel at interval on time domain of mapping uplink control channel.
19. a communication equipment is characterized in that, comprising:
First map unit, be used for full sub-district is covered the OFDM symbol that channel or high-power send channel are mapped to the transmission frame descending time slot, and the protection in the described transmission frame is not shone upon the OFDM symbol that full sub-district covers arbitrary channel in channel and the high-power send channel at interval with described OFDM symbol at interval on time domain;
Second map unit is used for ascending control channel is mapped to the OFDM symbol of described transmission frame ascending time slot, and described protection at interval with the OFDM symbol of the mapping uplink control channel OFDM symbol of mapping uplink control channel not at interval on time domain;
Transmitting element is used to send the OFDM symbol of described transmission frame;
The protection that plays a protective role when wherein, described protection is descending time slot and ascending time slot conversion at interval at interval.
20. a communication system is characterized in that, comprising:
Terminal equipment is used to send upstream data and downlink data receiving;
The base station, be used to receive described upstream data and send described downlink data, wherein, in the downlink data transmission frame, full sub-district covering channel or high-power send channel are mapped on the OFDM symbol of descending time slot in the transmission frame, and the protection in the described transmission frame is not shone upon the OFDM symbol that full sub-district covers arbitrary channel in channel and the high-power send channel at interval with described OFDM symbol at interval on time domain; Ascending control channel is mapped on the OFDM symbol of ascending time slot in the described transmission frame, and described protection at interval with the OFDM symbol of the mapping uplink control channel OFDM symbol of mapping uplink control channel not at interval on time domain;
The protection that plays a protective role when wherein, described protection is descending time slot and ascending time slot conversion at interval at interval.
21. communication system as claimed in claim 20 is characterized in that, described base station comprises:
First map unit, be used for full sub-district is covered the OFDM symbol that channel or high-power send channel are mapped to the transmission frame descending time slot, and the protection in the described transmission frame is not shone upon the OFDM symbol that full sub-district covers arbitrary channel in channel and the high-power send channel at interval with described OFDM symbol at interval on time domain, the number of the OFDM symbol at described interval is at least one;
Second map unit is used for ascending control channel is mapped to the OFDM symbol of described transmission frame ascending time slot, and described protection at interval with the OFDM symbol of the mapping uplink control channel OFDM symbol of mapping uplink control channel not at interval on time domain;
Transmitting element is used to send the OFDM symbol of described transmission frame.
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