CN101159484B - TDD system signal transmitting method and frame structure - Google Patents
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Abstract
The invention discloses a method of transmitting a signal of a time division duplex system, which includes that within the time length of a half-frame of wireless frames, the base station firstly transmits signal on M downlink special time slots, thereafter does not transmit signal on a protective gap, and then receives signal on N uplink special time slots; a lengthened uplink and/or downlink time slot is included in the uplink time slots and/or the downlink time slots, other time slots, including normal uplink time slots and normal downlink time slots, are the normal time slots of equal length, and the time length of the lengthened time slot is more than that of the normal time slots. A frame structure used is that within the time length of a half-frame of wireless frames, each half frame includes M downlink time slots, one protective gap and N uplink time slots, a lengthened uplink and/or downlink time slot is included in the uplink time slots and/or the downlink time slots, and other time slots are the normal time slots of equal length, wherein M and N are integers. The invention resolves the problem of wasting DwPTS and UpPTS resources in the prior system; when different time slot ratios are used, the position of GP is not fixed.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a method for transmitting a time division duplex system signal and a frame structure.
Background
Fig. 1 is a schematic diagram of a radio frame structure of a tdd system. In this illustration, a 10ms radio frame consists of two equal length fields, each of 5ms length. Each field in turn comprises 7 general slots (also called subframes) and 3 lengthened slots: downlink pilot time slot DwPTS, guard interval GP and uplink pilot time slot UpPTS.
The total length of the 3 lengthened time slots DwPTS, GP and UpPTS is equal to 275 us. The time slot length of the DwPTS is equal to about 83.33us, a primary synchronization channel (P-SCH) signal mainly used for downlink synchronization is transmitted on the middle bandwidth of the time slot, and other bandwidths of the time slot do not transmit data; the time slot length of GP is equal to 50us for protection of switching from downlink time slot to uplink time slot; the time slot length of the UpPTS is about 141.67us, and an uplink random access signal mainly used for uplink synchronization is transmitted in the time slot.
In 7 general slots, each having a length of 675us, to simplify system implementation, TS0 is always allocated as a downlink slot, and a secondary synchronization channel (S-SCH) signal for downlink synchronization is transmitted on the middle bandwidth of the last symbol of the slot. The other 6 general slots, namely: TS 1-TS 6 can be flexibly allocated to uplink or downlink time slots according to service needs.
When a general slot is a downlink slot, each slot includes 8 or 9 symbols transmitted in an OFDM (orthogonal frequency division multiplexing) manner (the number of symbols is related to the cyclic prefix of the symbol, and when the cyclic prefix is a normal cyclic prefix, each slot includes 9 symbols, and when the cyclic prefix is an extended cyclic prefix, each slot includes 8 symbols). In the time slot, the control channel is usually several symbols before the time slot, and the downlink shared channel for transmitting the general data of the user is several symbols after the time slot.
When a general slot is an uplink slot, each slot includes 8 or 9 symbols transmitted in a single carrier manner (the number of symbols is related to the cyclic prefix of the symbol, and when the cyclic prefix is a normal cyclic prefix, each slot includes 9 symbols, and when the cyclic prefix is an extended cyclic prefix, each slot includes 8 symbols). In the time slot, the control channel signal is usually at two sides of the system bandwidth, and the duration is one time slot; the uplink shared channel signal for transmitting the general data of the user is in the rest position of the system bandwidth, and the duration is also one time slot.
The time division duplex system has a similar frame structure to the existing TD-SCDMA (time division-synchronous code division multiple access) system. When the system coexists with the adjacent frequency of the existing TD-SCDMA system, the mutual interference of the signals of the time division duplex system and the TD-SCDMA system can be effectively avoided as long as the uplink and downlink time slot switching proportion set by the system is the same as that of the TD-SCDMA system.
However, the foregoing time division duplex system has the following problems:
1. the setting of the GP is very inflexible. In this system, the GP slot length is equal to 50 us. When the system needs to support a larger range of coverage, the length of the GP must be extended. The GP may be expanded by reserving the UpPTS slot as a GP slot, or reserving the UpPTS slot and TS1 as GP slots (note that, part of the symbols of TS1 may not be reserved as GP because the uplink control channel is usually on both sides of the system bandwidth and has a duration of one slot, if part of the symbols of TS1 is reserved as GP, the reception performance of the uplink control channel may be seriously degraded, or part of the symbols of DwPTS or/and TS0 may not be reserved as GP because the primary synchronization signal P-SCH is transmitted on the DwPTS and the secondary synchronization signal S-SCH is transmitted on the last symbol of TS0, if part of the symbols of DwPTS or/and TS0 is reserved as GP, the user may not receive the P-SCH or P/S-SCH signal, which is the signal that the user access system needs to receive first, and the user correctly receives the P/S-SCH signal, then the system can not be accessed)
2. Since the P/S-SCH signal is located at the boundary of the downlink slot to uplink slot switching, as mentioned above, the P/S-SCH signal is the signal that the user access system first needs to receive, and therefore, the power of the P/S-SCH signal is usually greater than that of other signals. In a cellular environment, the receiving performance of an uplink time slot signal can be seriously influenced due to the larger power of a P/S-SCH signal;
3. the DwPTS is not efficiently utilized. When the bandwidth of the system is wider, the utilization efficiency of the DwPTS slot is low because only the P-SCH signal is transmitted in the middle bandwidth (1.25MHz) of the system bandwidth.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for transmitting a time division duplex system signal and a frame structure thereof, so that the transmitted signal can coexist with the adjacent frequency of the existing TD-SCDMA system, and the problems mentioned above can be solved.
The technical scheme adopted by the invention is as follows:
the invention provides a method for transmitting a time division duplex system signal, which comprises the following steps: in the duration of a half frame of a wireless frame, a base station firstly sends signals on M downlink time slots, then does not send signals on a protection interval, and then receives signals on N uplink time slots, wherein the uplink time slots and/or the downlink time slots comprise a lengthened uplink time slot and/or a lengthened downlink time slot, the rest time slots comprise common time slots with the same length as the common uplink time slot and the common downlink time slot, the duration of the lengthened time slots is greater than the common time slots, and M, N is a positive integer.
Further, within the duration of a half frame, the base station sequentially sends signals on a lengthened downlink time slot and M-1 common downlink time slots, then does not send signals on the guard interval, and then receives signals on N uplink time slots, where the N uplink time slots include a lengthened uplink time slot, a synchronization signal is sent on the lengthened downlink time slot, and an uplink random access signal is sent on any one or more continuous uplink time slots.
Further, within the duration of a half frame, the base station sequentially sends signals on the first general downlink time slot and M-1 downlink time slots, where the M-1 downlink time slots include a lengthened downlink time slotThen, no signal is sent in the guard interval, and then signals are received in N uplink time slots, wherein the N uplink time slots comprise a lengthened uplink time slot, and the synchronous signal is in the first general downlink time slot TS0And uplink random access signals are transmitted on any one or more continuous uplink time slots.
Further, within the duration of a half frame, after the base station sequentially sends signals on a lengthened downlink time slot and M-1 general downlink time slots, no signal is sent on the guard interval, then signals are received on N general uplink time slots, a synchronization signal is sent on the lengthened downlink time slot, and an uplink random access signal is sent on any one or more continuous uplink time slots.
Further, within the duration of a half frame, the base station sequentially sends signals on a first general downlink time slot and M-1 downlink time slots, wherein the M-1 downlink time slots include a lengthened downlink time slot, then does not send signals on the guard interval, then receives signals on the N general uplink time slots, and the synchronization signal is in the first general downlink time slot TS0And uplink random access signals are transmitted on any one or more continuous uplink time slots.
Further, within the duration of a half frame, the base station sequentially sends signals at M general downlink time slots, then does not send signals at the guard interval, and then receives signals at N uplink time slots, where the N uplink time slots include a lengthened uplink time slot, the synchronization signal is sent at the first downlink time slot, and the uplink random access signal is sent at any one or more consecutive uplink time slots.
Further, within the duration of a half frame, the base station sequentially sends signals at the M general downlink time slots, then does not send signals at the guard interval, then receives signals at the N general uplink time slots, and the synchronization signal is at the first general downlink time slot TS0Uplink random access signal is transmitted on any one or more continuous uplink time slotsAnd (5) feeding.
Further, the lengthened uplink timeslot is a first uplink timeslot of the N uplink timeslots.
Further, the duration of the field is 5ms, and the duration of each timeslot in the field adopts one of the following configuration modes:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot675us, the length of the lengthened downlink slot is equal to TslotPlus 166.67us, the duration T of the guard intervalGP25us, the length of the lengthened uplink time slot is equal to TslotPlus 83.33 us;
use of a conventional cyclic prefix T in a generic slotCP-normalEach generic slot contains 9 uplink or downlink symbols each of duration T, 8.33ussymbol66.67 us; alternatively, the general slot uses an extended cyclic prefix TCP-extendedEach generic slot contains 8 uplink or downlink symbols, each symbol having a duration T ═ 17.71ussymbol＝66.67us；
The lengthened downlink time slot comprises 2 downlink OFDM symbols with 16.67us of cyclic prefix besides OFDM symbols of a common downlink time slot, and the lengthened uplink time slot comprises 1 uplink symbol with 16.67us of cyclic prefix besides symbols of a common uplink time slot;
second configuration
The sum of M and N is 7, and the duration T of the general time slotslot667us, the length of the lengthened downlink timeslot is equal to TslotPlus 166.67us, the duration T of the guard intervalGP81us, the length of the lengthened uplink time slot is equal to TslotPlus 83.33 us;
when the conventional cyclic prefix is used in the general time slot, each general time slot comprises 9 uplink or downlink symbols, and each general time slot comprises 9 uplink or downlink symbolsSymbol duration of Tsymbol66.67us, where the cyclic prefix duration T of the first symbolCP-normal1Cyclic prefix duration T of other symbols 8.33usCP-normal17.29 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration TCP-extended＝16.67us；
The lengthened downlink time slot comprises 2 downlink OFDM symbols with 16.67us cyclic prefix besides the OFDM symbols of the common downlink time slot; the lengthened uplink time slot comprises 1 uplink symbol with 16.67us of cyclic prefix besides the symbol of the common uplink time slot.
Further, the synchronization signal is transmitted on the last two OFDM symbols of the first downlink slot.
Further, the duration of the field is 5ms, and the duration of each timeslot in the field adopts one of the following configuration modes:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot675us, the length of the lengthened downlink slot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝25us；
Use of a conventional cyclic prefix T in a generic slotCP-normalEach generic slot contains 9 uplink or downlink symbols each of duration T, 8.33ussymbol66.67 us; alternatively, the general slot uses an extended cyclic prefix TCP-extendedEach generic slot contains 8 uplink or downlink symbols, each symbol having a duration T ═ 17.71ussymbol＝66.67us；
The lengthened downlink time slot comprises 3 downlink OFDM symbols with 16.67us cyclic prefix besides OFDM symbols of common downlink time slots;
second configuration
The sum of M and N is 7, and the duration T of the general time slotslot667us, the length of the lengthened downlink timeslot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝81us；
When the conventional cyclic prefix is used in the general time slot, each general time slot comprises 9 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, where the cyclic prefix duration T of the first symbolCP-normal1Cyclic prefix duration T of other symbols 8.33usCP-normal17.29 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration TCP-extended＝16.67us；
The lengthened downlink time slot comprises 3 downlink OFDM symbols with 16.67us cyclic prefix besides the OFDM symbols of the common downlink time slot.
Further, the duration of the field is 5ms, and the duration of each timeslot in the field adopts one of the following configuration modes:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot675us, the length of the lengthened uplink slot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝25us；
Use of a conventional cyclic prefix T in a generic slotCP-normalEach generic slot contains 9 uplink or downlink symbols each of duration T, 8.33ussymbol66.67 us; alternatively, the general slot uses an extended cyclic prefix TCP-extendedEach generic slot contains 8 uplink or downlink symbols, each symbol having a duration T ═ 17.71ussymbol＝66.67us；
The lengthened uplink time slot comprises 3 uplink symbols with 16.67us of cyclic prefix besides the symbols of the common uplink time slot;
second configuration
The sum of M and N is 7, and the duration T of the general time slotslot667us, the length of the lengthened uplink timeslot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝81us；
When the conventional cyclic prefix is used in the general time slot, each general time slot comprises 9 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, where the cyclic prefix duration T of the first symbolCP-normal1Cyclic prefix duration T of other symbols 8.33usCP-normal17.29 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration TCP-extended＝16.67us；
The lengthened uplink time slot comprises 3 uplink symbols with 16.67us of cyclic prefix besides the symbols of the common uplink time slot.
Further, the duration of the field is 5ms, and the duration of each timeslot in the field adopts one of the following configuration modes:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot713.54us, the duration T of the guard intervalGP＝5.22us；
The conventional cyclic prefix is used in general time slots, each general time slot comprises 10 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, duration of cyclic prefix TCP-normal4.69 us; alternatively, the extended cyclic prefix is used in general time slots, each of which contains 9 uplink or downlink symbols each having a duration of Tsymbol66.67us, first and secondCyclic prefix duration T of two symbolsCP-extended113.02us, cyclic prefix duration T of the remaining symbolsCP-extended2＝12.5us；
Second configuration
The sum of M and N is 7, and the duration T of the general time slotslot713.54us, the duration T of the guard intervalGP＝5.22us；
The conventional cyclic prefix is used in general time slots, each general time slot comprises 10 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, duration of cyclic prefix TCP-normal4.69 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration T of the first and second symbolsCP-extended122.92us, cyclic prefix duration T of the remaining symbolsCP-extended2＝22.4us。
The invention also provides a frame structure of the time division duplex system:
within the duration of a half frame of a radio frame, each half frame comprises M downlink time slots, a guard interval and N uplink time slots, the uplink time slots and/or the downlink time slots comprise lengthened uplink and/or downlink time slots, the rest time slots are common time slots with equal length and comprise common uplink time slots and common downlink time slots, the duration of the lengthened time slots is greater than that of the common time slots, and M, N is a positive integer.
Further, the half frame sequentially includes a lengthened downlink time slot, M-1 general downlink time slots, the guard interval, and N uplink time slots, where the N uplink time slots include a lengthened uplink time slot, the synchronization signal is sent on the lengthened downlink time slot, and the uplink random access signal is sent on any one or more consecutive uplink time slots.
Further, the half frame sequentially includes a first general downlink time slot, M-1 downlink time slots, the guard interval, and N uplink time slots, where the M-1 downlink time slots include a lengthened downlink time slot, the N uplink time slots include a lengthened uplink time slot, the synchronization signal is sent on the lengthened downlink time slot, and the uplink random access signal is sent on any one or more consecutive uplink time slots.
Further, the half frame sequentially includes a lengthened downlink time slot, M-1 general downlink time slots, the guard interval, and N general uplink time slots, the synchronization signal is sent on the lengthened downlink time slot, and the uplink random access signal is sent on any one or more continuous general uplink time slots.
Further, the half frame sequentially includes a first general downlink time slot, M-1 downlink time slots, the guard interval, and N general uplink time slots, where the M-1 downlink time slots include a lengthened downlink time slot, the synchronization signal is sent on the lengthened downlink time slot, and the uplink random access signal is sent on any one or more consecutive general uplink time slots.
Further, the half frame sequentially includes M general downlink time slots, the guard interval, and N uplink time slots, where the N uplink time slots include a lengthened uplink time slot, the synchronization signal is sent on the lengthened downlink time slot, and the uplink random access signal is sent on any one or more consecutive uplink time slots.
Further, the half frame sequentially includes M general downlink time slots, the guard interval, and N general uplink time slots, the synchronization signal is sent on the lengthened downlink time slot, and the uplink random access signal is sent on any one or more consecutive uplink time slots.
Further, the lengthened uplink timeslot is a first uplink timeslot of the N uplink timeslots.
Further, the duration of the field is 5ms, and the duration of each timeslot in the field adopts one of the following configuration modes:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot675us, the length of the lengthened downlink slot is equal to TslotPlus 166.67us, the duration T of the guard intervalGP25us, the length of the lengthened uplink time slot is equal to TslotPlus 83.33 us;
use of a conventional cyclic prefix T in a generic slotCP-normalEach generic slot contains 9 uplink or downlink symbols each of duration T, 8.33ussymbol66.67 us; alternatively, the general slot uses an extended cyclic prefix TCP-extendedEach generic slot contains 8 uplink or downlink symbols, each symbol having a duration T ═ 17.71ussymbol＝66.67us；
The lengthened downlink time slot comprises 2 downlink OFDM symbols with 16.67us of cyclic prefix besides OFDM symbols of a common downlink time slot, and the lengthened uplink time slot comprises 1 uplink symbol with 16.67us of cyclic prefix besides symbols of a common uplink time slot;
second configuration
The sum of M and N is 7, and the duration T of the general time slotslot667us, the length of the lengthened downlink timeslot is equal to TslotPlus 166.67us, the duration T of the guard intervalGP81us, the length of the lengthened uplink time slot is equal to TslotPlus 83.33 us;
when the conventional cyclic prefix is used in the general time slot, each general time slot comprises 9 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, where the cyclic prefix duration T of the first symbolCP-normal1Cyclic prefix duration T of other symbols 8.33usCP-normal17.29 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration TCP-extended＝16.67us；
The lengthened downlink time slot comprises 2 downlink OFDM symbols with 16.67us cyclic prefix besides the OFDM symbols of the common downlink time slot; the lengthened uplink time slot comprises 1 uplink symbol with 16.67us of cyclic prefix besides the symbol of the common uplink time slot.
Further, the synchronization signal is transmitted on the last two OFDM symbols of the first downlink slot.
Further, the duration of the field is 5ms, and the duration of each timeslot in the field adopts one of the following configuration modes:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot675us, the length of the lengthened downlink slot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝25us；
Use of a conventional cyclic prefix T in a generic slotCP-normalEach generic slot contains 9 uplink or downlink symbols each of duration T, 8.33ussymbol66.67 us; alternatively, the general slot uses an extended cyclic prefix TCP-extendedEach generic slot contains 8 uplink or downlink symbols, each symbol having a duration T ═ 17.71ussymbol＝66.67us；
The lengthened downlink time slot comprises 3 downlink OFDM symbols with 16.67us cyclic prefix besides OFDM symbols of common downlink time slots;
second configuration
The sum of M and N is 7, and the duration T of the general time slotslot667us, the length of the lengthened downlink timeslot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝81us；
When a normal cyclic prefix is used in a general slot, each general slotThe time slot comprises 9 uplink or downlink symbols, each symbol having a duration of Tsymbol66.67us, where the cyclic prefix duration T of the first symbolCP-normal1Cyclic prefix duration T of other symbols 8.33usCP-normal17.29 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration TCP-extended＝16.67us；
The lengthened downlink time slot comprises 3 downlink OFDM symbols with 16.67us cyclic prefix besides the OFDM symbols of the common downlink time slot.
Further, the duration of the field is 5ms, and the duration of each timeslot in the field adopts one of the following configuration modes:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot675us, the length of the lengthened uplink slot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝25us；
Use of a conventional cyclic prefix T in a generic slotCP-normalEach generic slot contains 9 uplink or downlink symbols each of duration T, 8.33ussymbol66.67 us; alternatively, the general slot uses an extended cyclic prefix TCP-extendedEach generic slot contains 8 uplink or downlink symbols, each symbol having a duration T ═ 17.71ussymbol＝66.67us；
The lengthened uplink time slot comprises 3 uplink symbols with 16.67us of cyclic prefix besides the symbols of the common uplink time slot;
second configuration
The sum of M and N is 7, and the duration T of the general time slotslot667us, the length of the lengthened uplink timeslot is equal to TslotPlus 250us, the protectionDuration of interval TGP＝81us；
When the conventional cyclic prefix is used in the general time slot, each general time slot comprises 9 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, where the cyclic prefix duration T of the first symbolCP-normal1Cyclic prefix duration T of other symbols 8.33usCP-normal17.29 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration TCP-extended＝16.67us；
The lengthened uplink time slot comprises 3 uplink symbols with 16.67us of cyclic prefix besides the symbols of the common uplink time slot.
Further, the duration of the field is 5ms, and the duration of each timeslot in the field adopts one of the following configuration modes:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot713.54us, the duration T of the guard intervalGP＝5.22us；
The conventional cyclic prefix is used in general time slots, each general time slot comprises 10 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, duration of cyclic prefix TCP-normal4.69 us; alternatively, the extended cyclic prefix is used in general time slots, each of which contains 9 uplink or downlink symbols each having a duration of Tsymbol66.67us, cyclic prefix duration T of the first and second symbolsCP-extended113.02us, cyclic prefix duration T of the remaining symbolsCP-extended2＝12.5us；
Second configuration
The sum of M and N is 7, and the duration T of the general time slotslot713.54us, the duration T of the guard intervalGP＝5.22us；
The conventional cyclic prefix is used in general time slots, each general time slot comprises 10 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, duration of cyclic prefix TCP-normal4.69 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration T of the first and second symbolsCP-extended122.92us, cyclic prefix duration T of the remaining symbolsCP-extended2＝22.4us。
By adopting the scheme of the invention, the following technical effects can be achieved:
1. the time slots DwPTS and UpPTS are not included any more, so that the problem of resource waste of the DwPTS and the UpPTS in the original system is solved;
the 2.5ms half frame contains 7 service time slots, wherein the synchronous signal is fixed on the first downlink time slot for transmission;
3. when different time slot proportions are adopted relative to the synchronous channel, the GP position is not fixed;
4. the synchronous signal is far away from the uplink and downlink switching point, thereby ensuring that even if the power of the synchronous signal is improved, the synchronous signal does not bring great interference to the uplink reception of other base stations;
5. the duration of the guard interval GP can be flexibly configured, for example, the duration of the GP can be increased by puncturing downlink data symbols, and the GP time is increased by a granularity at a symbol level.
Drawings
Fig. 1 is a schematic diagram of a signal frame structure of a time division duplex system in the prior art;
fig. 2 is a flow chart of a method for transmitting signals of a time division duplex system according to an embodiment of the present invention;
FIG. 3 shows an example of the present invention at TDL≠0，TUL≠0，TGPA frame structure diagram under the condition of not equal to 0;
FIG. 4 shows a graph at T in an embodiment of the present inventionDL≠0，TUL≠0，TGPAnother frame structure diagram under the condition of not equal to 0;
FIG. 5 shows an example of the present invention at TDL≠0，TUL＝0，TGPA frame structure diagram under the condition of not equal to 0;
FIG. 6 shows a graph at T in an embodiment of the present inventionDL≠0，TUL＝0，TGPAnother frame structure diagram under the condition of not equal to 0;
FIG. 7 shows a graph at T in an embodiment of the present inventionDL＝0，TUL≠0，TGPA frame structure diagram under the condition of not equal to 0;
FIG. 8 shows a graph at T in an embodiment of the present inventionDL＝0，TUL＝0，TGPNot equal to 0, a frame structure diagram.
Detailed Description
The technical solution of the present invention will be described in more detail with reference to the accompanying drawings and examples.
A method for transmitting time division duplex system signals comprises the following steps: in the duration of a half frame of a wireless frame, a base station firstly sends signals on M downlink time slots, then does not send signals on a protection interval, and then receives signals on N uplink time slots, wherein the uplink time slots and/or the downlink time slots comprise lengthened uplink and/or downlink time slots, the rest time slots are common time slots with equal length and comprise common uplink time slots and common downlink time slots, the duration of the lengthened time slots is greater than the common time slots, and M, N is a positive integer.
The physical layer frame structure adopting the signal transmission method is as follows: the method comprises the steps that in the duration of one half frame of a wireless frame, M downlink time slots, a protection interval and N uplink time slots are included; the uplink time slot and/or the downlink time slot comprise a lengthened uplink time slot and/or a lengthened downlink time slot, the rest time slots are common time slots with equal length and comprise a common uplink time slot and a common downlink time slot, the duration of the lengthened time slot is longer than that of the common time slot, M, N is a positive integer
Taking a half frame containing 7 general slots as an example, a 10ms wireless frame includes two 5ms half frames with the same length, wherein each 5ms half frame includes 7 slots, denoted as TS0～TS6Each general time slot (including general uplink time slot and general downlink time slot) has a duration of TslotAnd the residual time obtained by subtracting the duration (time length) of 7 times of the common time slot from 5ms is recorded as TspecialThen T is addedspecialIs divided into 3 parts, respectively denoted as TDL、TGPAnd TULThe above time variables satisfy the following relationship:
7×Tslot+Tspecial＝5ms
TDL+TGP+TUL＝Tspecial
the invention increases the time length of a common downlink time slot by TDLThen obtaining a lengthened downlink time slot, and increasing the time length of a common uplink time slot by TULThen a lengthened uplink time slot, T, is obtainedGPAs a guard interval for uplink/downlink timeslot switching.
According to the above idea, a 5ms half frame containing 7 general slots can be divided as follows:
the 5ms half frame includes 1 lengthened downlink timeslot, 1 lengthened uplink timeslot, 5 equal-length general timeslots, and GP (i.e. when T is T)UL、TDL、TGPCase where none is equal to 0);
alternatively, the 5ms half frame contains 1 lengthened downlink slot, 6 equal-length normal slots, and GP (i.e. when T isUL＝0，TDLAnd TGPCase not equal to 0);
alternatively, the 5ms half frame contains 1 elongated uplink slot, 6 equal-length normal slots, and GP (when T isDL＝0，TULAnd TGPCase not equal to 0);
alternatively, a 5ms half-frame contains 7 equal-length general slots and GP (i.e., when T isULAnd TDLIs equal to 0, TGPCase not equal to 0).
Based on the above core idea, the present invention can have the following typical slot configurations, but is not limited to these slot configurations. Suppose TS0～TSiFor downlink time slots, TSi+1～TS6Is an uplink time slot, wherein i is less than or equal to 5:
configuration 1-1: the half frame of 5ms includes 1 lengthened downlink time slot, 1 lengthened uplink time slot, 5 equal-length general time slots, and GP, i.e. when T isDL≠0，TUL≠0，TGPCase not equal to 0.
As shown in FIG. 3, assuming that the ratio of downlink/uplink timeslots of the radio frame is 4: 3, TS0′～TS3For downlink time slots, TS4′～TS6Is an uplink time slot in which TS0' is an elongated downlink slot having a duration of one general slot duration plus TDLThe duration of (d); TS (transport stream)4' is an extended uplink slot with a duration of one general slot plus TULThe duration of (c). At the same time, the synchronization signal P/S-SCH is fixed at TS0' last two symbols are sent, uplink random access signal is in TS4′～TS6On any one or more consecutive uplink timeslots.
In the duration of a half frame of a wireless frame, a base station sequentially transmits signals on an elongated downlink time slot and 3 general downlink time slots, does not transmit signals on a protection interval, and sequentially receives signals on an elongated uplink time slot and 2 general uplink time slots. In another embodiment, the lengthened uplink timeslot may also be the 2 nd or 3 rd uplink timeslot.
(1) Will TS0And TDLAre combined into a lengthened downlink time slot TS0′，TS0The' duration is:
TS0′＝Tslot+TDL；
(2) will TSi+1And TULAre combined into a newly lengthened uplink time slot TSi+1′，TSi+1The' duration is:
TSi+1′＝Tslot+TUL；
(3)TGPat TSiAnd TSi+1' to (1);
(4) synchronization signal P/S-SCH in first downlink time slot TS0' is sent on the last two symbols;
(5) uplink random access signal at TSi+1′～TS6On any one or more consecutive time slots.
Configuration 1-2: the 5ms half-frame contains 1 elongated downlink timeslot, 1 elongated uplink timeslot, 5 equal-length general timeslots, and GP, i.e. when T isDL≠0，TUL≠0，TGPCase not equal to 0.
As shown in FIG. 4, assuming that the ratio of downlink/uplink timeslots of the radio frame is 4: 3, TS0～TS3Is' a downlink time slot, TS4 ′～TS6Is an uplink time slot in which TS3' is an elongated downlink slot having a duration of one general slot duration plus TDLDuration of (TS)4' is an extended uplink slot with a duration of one general slot plus TULThe duration of (c). At the same time, the synchronization signal P/S-SCH is fixed at TS0Is sent on the last two symbols, and the uplink random access signal is sent on the TS4′～TS6On any one or more consecutive uplink timeslots.
In the duration of a half frame of a wireless frame, a base station sequentially transmits signals on 3 general downlink time slots and an elongated downlink time slot, does not transmit signals on a protection interval, and sequentially receives signals on an elongated uplink time slot and 2 general uplink time slots.
(1) Will TSiAnd TDLAre combined into a lengthened downlink time slot TSi′，TSiThe' duration is:
TSi′＝Tslot+TDL；
(2) will TSi+1And TULAre combined into a lengthened uplink time slot TSi+1′，TSi+1The' duration is:
TSi+1′＝Tslot+TUL；
(3)TGPat TSi' and TSi+1' to (1);
(4) synchronization signal P/S-SCH at TS0Is sent on the last two symbols;
(5) uplink random access signal at TSi+i′～TS6On any one or more consecutive time slots.
Some typical parameter designs of the above configuration are further given below, but are not limited to these parameter designs:
parameter design 1-1: applicable to typical configurations 1-1 and 1-2.
Tslot＝675us
Tspecial＝5000-7×675＝275us
TDL＝166.67us
TUL＝83.33us
TGP＝25us
TCP-normal＝8.33us
TCP-extended＝17.71us
With this parameter design, the duration of a typical slot is 675 us. When a normal cyclic prefix is used, each general slot contains 9 up/down symbols, each symbol having a duration TsymbolDuration T of each cyclic prefix of 66.67usCP-normal8.33 us; when an extended cyclic prefix is used, each generic slot contains 8 up/down symbols, each symbol of duration TsymbolDuration T of each cyclic prefix of 66.67usCP-extended＝17.71us。TDLComprising 2 downlink symbols with cyclic prefix of 16.67us, TULContaining 1 uplink symbol with a cyclic prefix of 16.67 us. Under this parametric design, for a typical configuration 1-1, when T isDLAnd TS0Merging into a new time slot TS0' thereafter, the synchronization signal P/S-SCH can be at TDLIs transmitted, i.e. at TS0' is sent on the last two symbols; the uplink random access signal is transmitted on one or more consecutive uplink time slots.
In the various parameter configurations described above and below, the downlink time slot may use OFDM symbols, and the uplink may use other symbols with cyclic prefix, such as symbols transmitted according to a single carrier method, but is not limited thereto.
Parameter design 1-2: applicable to typical configurations 1-1 and 1-2.
Tslot＝667us
Tspecial＝5000-7×667＝331us
TDL＝166.67us
TUL＝83.33us
TGP＝81us
TCP-normal1＝8.33us，TCP-normal2＝7.29us
TCP-extended＝16.67us
Under the parameter design, the duration of a general slot is 667us, and when a conventional cyclic prefix is used, each general slot contains 9 uplink/downlink symbols, and each symbol has a duration Tsymbol66.67us, the cyclic prefix of the first symbol is TCP-normal18.33us, the cyclic prefix of the rest symbols is TCP-normal27.29 us; when an extended cyclic prefix is used, each generic slot contains 8 up/down symbols, the duration of a symbol being Tsymbol＝66.67us，TCP-extended＝16.67us。TDLContaining 2 downlink OFDM symbols with cyclic prefix of 16.67us, TULContaining 1 uplink symbol with a cyclic prefix of 16.67 us. Under this parametric design, for a typical configuration 1-1, when T isULAnd TS0Merging into a new time slot TS0' thereafter, the P/S-SCH synchronization signal may be at TDLIs transmitted. I.e. at TS0' is transmitted on the last two OFDM symbols and the uplink random access signal is transmitted on one or more consecutive uplink slots.
Configuration 2-1: the 5ms half-frame contains 1 lengthened downlink slot, 6 equal-length normal slots, and GP, i.e. when T isDL≠0，TUL＝0，TGPCase not equal to 0.
As shown in FIG. 5, assuming that the ratio of downlink/uplink timeslots of the radio frame is 4: 3, TS0′～TS3For downlink time slots, TS4～TS6Is an uplink time slot in which TS0' is an elongated downlink slot having a duration of one general slot duration plus TDLThe duration of (c). At the same time, the synchronization signal P/S-SCH is fixed at TS0' last two symbols are sent, uplink random access signal is in TS4～TS6On any one or more consecutive uplink timeslots.
In the duration of a half frame of a wireless frame, a base station sequentially transmits signals on an elongated downlink time slot and 3 general downlink time slots, does not transmit signals on a protection interval, and receives signals on 3 general uplink time slots.
(1) Will TS0And TDLAre combined into a lengthened downlink time slot TS0 ′，TS0The' duration is:
TS0′＝Tslot+TDL；
(2) due to TUL0, there is no lengthened uplink timeslot;
(3)TGPat TSiAnd TSi+1To (c) to (d);
(4) synchronization signal P/S-SCH at TS0' is sent on the last two symbols;
(5) uplink random access signal at TSi+1～TS6On any one or more consecutive time slots.
Configuration 2-2: the 5ms half-frame contains 1 lengthened downlink slot, 6 equal-length normal slots, and GP, i.e. when T isDL≠0，TUL＝0，TGPCase not equal to 0.
As shown in FIG. 6, assuming that the ratio of downlink/uplink timeslots of the radio frame is 4: 3, TS0～TS3Is' a downlink time slot, TS4～TS6Is an uplink time slot in which TS3' is an elongated downlink slot having a duration of one general slot duration plus TDLThe duration of (c). At the same time, the synchronization signal P/S-SCH is fixed at TS0Is sent on the last two symbols, and the uplink random access signal is sent on the TS4～TS6On any one or more consecutive uplink timeslots.
In the duration of a half frame of a wireless frame, a base station sequentially transmits signals on 3 general downlink time slots and an extended downlink time slot, does not transmit signals on a protection interval, and receives signals on 3 general uplink time slots.
(1) Will TSiAnd TDLAre combined into a lengthened downlink time slot TSi′，TSiThe' duration is:
TSi′＝Tslot+TDL；
(2) due to TUL0, there is no lengthened uplink timeslot;
(3)TGPat TSi' and TSi+1To (c) to (d);
(4) synchronization signal P/S-SCH at TS0Is sent on the last two symbols;
(5) uplink random access signal at TSi+1～TS6On any one or more consecutive time slots.
Parameter design 2-1: applicable to typical configurations 2-1 and 2-2.
Tslot＝675us
Tspecial＝5000-7×675＝275us
TDL＝250us
TUL＝0
TGP＝25us
TCP-normal＝8.33us
TCP-extended＝17.71us
With this parameter design, the duration of a typical slot is 675 us. When a normal cyclic prefix is used, each general slot contains 9 up/down symbols, each symbol having a duration TsymbolDuration T of each cyclic prefix of 66.67usCP-normal8.33 us; when an extended cyclic prefix is used, each general slot contains 8 up/down symbols per slotDuration of one symbol is TsymbolDuration T of each cyclic prefix of 66.67usCP-extended＝17.71us。TDLContains 3 downlink OFDM symbols with cyclic prefix of 16.67 us. T isDLAnd can be combined with any downlink time slot into a new downlink time slot. The synchronization signal P/S-SCH is fixed and transmitted on the first downlink time slot, and the uplink random access signal is transmitted on one or more continuous uplink time slots.
Parameter design 2-2: applicable to typical configurations 2-1 and 2-2.
Tslot＝667us
Tspecial＝5000-7×667＝331us
TDL＝250us
TUL＝0
TGP＝81us
TCP-normal1＝8.33us，TCP-normal2＝7.29us
TCP-extended＝16.67us
Under the parameter design, the duration of a general slot is 667us, and when a conventional cyclic prefix is used, each general slot contains 9 uplink/downlink symbols, and each symbol has a duration Tsymbol66.67us, cyclic prefix duration T of the first symbolCP-normal18.33us, cyclic prefix duration T of each remaining symbolCP-normal27.29 us; when an extended cyclic prefix is used, each generic slot contains 8 up/down symbols, each symbol of duration TsymbolDuration T of each cyclic prefix of 66.67usCP-extended＝16.67us。TDLContains 3 downlink OFDM symbols with cyclic prefix of 16.67 us. T isDLCan be combined with any downlink time slot into a new downlink time slot. The synchronization signal is fixed and sent on the first downlink time slot, and the uplink random access signal is sent on one or more continuous uplink time slots.
Configuration 3: the 5ms half-frame contains 1 elongated uplink slot, 6 equal-length normal slots, and GP, i.e., when T isDL＝0，TUL≠0，TGPCase not equal to 0.
As shown in FIG. 7, assuming that the ratio of downlink/uplink timeslots of the radio frame is 4: 3, TS0～TS3For downlink time slots, TS4′～TS6Is an uplink time slot in which TS4' is an extended uplink slot with a duration of one general slot plus TULThe duration of (c). At the same time, the synchronization signal P/S-SCH is fixed at TS0Is sent on the last two symbols, and the uplink random access signal is sent on the TS4′～TS6On any one or more consecutive uplink timeslots.
In the duration of a half frame of a wireless frame, a base station firstly transmits signals on 4 common downlink time slots, then does not transmit signals on a protection interval, and then sequentially receives signals on a lengthened uplink time slot and 2 common uplink time slots.
(1) Due to TDL0, no lengthened downlink time slot;
(2) will TSi+1And TULAre combined into a newly lengthened uplink time slot TSi+1′，TSi+1The' duration is:
TSi+1′＝Tslot+TUL
(3)TGPat TSiAnd TSi+1' in the meantime.
(4) Synchronization signal P/S-SCH at TS0Is transmitted over the last two symbols.
(5) Uplink random access signal at TSi+1′～TS6On any one or more consecutive time slots.
Parameter design 3-1: applicable to the exemplary configuration 3.
Tslot＝675us
Tspecial＝5000-7×675＝275us
TDL＝0
TUL＝250us
TGP＝25us
TCP-normal＝8.33us
TCP-extended＝17.71us
With this parameter design, the duration of a typical slot is 675 us. When a normal cyclic prefix is used, each general slot contains 9 up/down symbols, each symbol having a duration TsymbolDuration T of each cyclic prefix of 66.67usCP-normal8.33 us; when an extended cyclic prefix is used, each generic slot contains 8 up/down symbols, each symbol having a duration TsymbolDuration T of each cyclic prefix of 66.67usCP-extended＝17.71us。TULContains 3 uplink symbols with a cyclic prefix of 16.67 us. T isULCan be combined with any uplink time slot into a new uplink time slot. The synchronization signal is fixed and sent on the first downlink time slot, and the uplink random access signal is sent on one or more continuous uplink time slots.
Parameter design 3-2: applicable to the exemplary configuration 3.
Tslot＝667us
Tspecial＝5000-7×667＝331us
TDL＝0
TUL＝250us
TGP＝81us
TCP-normal1＝8.33us，TCP-normal2＝7.29us
TCP-extended＝16.67us
Under the parameter design, the duration of a general slot is 667us, and when a conventional cyclic prefix is used, each general slot contains 9 uplink/downlink symbols, and the duration T of each symbolsymbol66.67us, cyclic prefix duration T of the first symbolCP-normal18.33us, cyclic prefix duration T of the remaining symbolsCP-normal27.29 us; when an extended cyclic prefix is used, each generic slot contains 8 up/down symbols, each symbol of duration Tsymbol66.67us, each cyclic prefix duration TCP-exetended＝16.67us。TULContains 3 uplink symbols with a cyclic prefix of 16.67 us. T isULAnd can be combined with any uplink time slot into a new uplink time slot. The synchronization signal is fixed and sent on the first downlink time slot, and the uplink random access signal is sent on one or more continuous uplink time slots.
Configuration 4: a5 ms half-frame contains 7 general slots and GP of equal length, i.e. when T isDL＝0，TUL＝0，TGPCase not equal to 0.
As shown in FIG. 8, assuming that the ratio of downlink/uplink timeslots of the radio frame is 4: 3, TS0～TS3For downlink time slots, TS4～TS6For the uplink time slots, each time slot lasts the same time. At the same time, the synchronization signal P/S-SCH is fixed at TS0Is sent on the last two symbols, and the uplink random access signal is sent on the TS4～TS6On any one or more consecutive uplink timeslots.
In the duration of a half frame of a wireless frame, a base station firstly transmits signals on 4 general downlink time slots, then does not transmit signals on a protection interval, and then receives signals on 3 general uplink time slots.
(1) Due to TDL0, no lengthened downlink time slot;
(2) due to TUL＝0，There is no lengthened uplink timeslot; (ii) a
(3)TGPAt TSiAnd TSi+1To (c) to (d);
(4) synchronization signal P/S-SCH at TS0Is sent on the last two symbols;
(5) uplink random access signal at TSi+1～TS6On any one or more consecutive time slots.
Parameter design 4-1: applicable to the above exemplary configuration 4.
Tslot＝713.54us
Tspecial＝5000-7×713.54＝5.22us
TDL＝0
TUL＝0
TGP＝5.22us
TCP-normal＝4.69us
TCP-extended1＝13.02us，TCP-extended2＝12.5us
Under this parametric design, the duration of a typical time slot is 713.54 us. When a normal cyclic prefix is used, each general slot contains 10 up/down symbols, each symbol having a duration TsymbolDuration T of each cyclic prefix of 66.67usCP-normal4.69 us; when an extended cyclic prefix is used, each generic slot contains 9 up/down symbols, each symbol having a duration Tsymbol66.67us, the cyclic prefix duration T corresponding to the first two symbolsCP-extended113.02us, cyclic prefix duration T for the remaining symbolsCP-extended212.5 us. GP duration is TGP5.22 us. The synchronization signal is fixed and sent on the first downlink time slot, and the uplink random access signal is sent on one or more continuous uplink time slots.
Parameter design 3-2: applicable to the above exemplary configuration 4.
Tslot＝713.54us
Tspecial＝5000-7×713.54＝5.22us
TDL＝0
TUL＝0
TGP＝5.22us
TCP-normal＝4.69us
TCP-extended1＝22.92us，TCP-extended2＝22.4us
Under this parametric design, the duration of a typical time slot is 713.54 us. When a normal cyclic prefix is used, each general slot contains 10 up/down symbols, each symbol having a duration TsymbolDuration T of each cyclic prefix of 66.67usCP-normal4.69 us; when an extended cyclic prefix is used, each generic slot contains 8 up/down symbols, each symbol of duration Tsymbol66.67us, the cyclic prefix duration T corresponding to the first two symbolsCP-extended122.92us, the remaining symbols correspond to a cyclic prefix duration TCP-extended222.4 us. Duration T of GPGP5.22 us. The synchronization signal is fixed and sent on the first downlink time slot, and the uplink random access signal is sent on one or more continuous uplink time slots.
It should be noted that, in other embodiments, in the various examples including the lengthened uplink timeslot, the lengthened uplink timeslot may not be the 1 st uplink timeslot, but may also be the 2 nd or 3 rd uplink timeslot, and the like. In the various examples described above that include an elongated downlink slot, the elongated downlink slot may not be the 1 st or last downlink slot, but may be an intermediate downlink slot.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A transmission method of time division duplex system signal, characterized by, in the duration of a half frame of the wireless frame, the base transceiver station sends the signal on M downstream time slots first, then does not send the signal on a guard interval, receive the signal on N upstream time slots, the said upstream time slot includes a lengthened upstream time slot, or include a lengthened upstream and downstream time slot in said upstream time slot and downstream time slot respectively, the other time slots, including ordinary upstream time slot and ordinary downstream time slot are the same long ordinary time slot, the duration of the said lengthened time slot is greater than the ordinary time slot, M, N is a positive integer;synchronizing signal in first general downlink time slot TS0Or on the lengthened first downlink time slot.
2. The transmission method of claim 1,
within the duration of a half frame, the base station does not send signals on the guard interval after sequentially sending signals on a lengthened downlink time slot and M-1 common downlink time slots, and then receives signals on N uplink time slots, wherein the N uplink time slots comprise a lengthened uplink time slot, a synchronization signal is sent on the lengthened downlink time slot, and an uplink random access signal is sent on any one or more continuous uplink time slots.
3. The transmission method of claim 1,
within the duration of a half frame, the base station sequentially sends signals on a first general downlink time slot and M-1 downlink time slots, wherein the M-1 downlink time slots comprise a lengthened downlink time slot, then signals are not sent on the guard interval, then the signals are received on N uplink time slots, the N uplink time slots comprise a lengthened uplink time slot, and the synchronous signals are in the first general downlink time slot TS0And uplink random access signals are transmitted on any one or more continuous uplink time slots.
4. The transmission method of claim 1,
within the duration of a half frame, the base station does not send signals on the guard interval after sending signals on M common downlink time slots in sequence, and then receives signals on N uplink time slots, wherein the N uplink time slots comprise a lengthened uplink time slot, a synchronization signal is sent on the first downlink time slot, and an uplink random access signal is sent on any one or more continuous uplink time slots.
5. The transmission method according to claim 2, 3 or 4,
the lengthened uplink time slot is a first uplink time slot of the N uplink time slots.
6. The transmission method according to claim 2 or 3, wherein the duration of the field is 5ms, and the duration of each slot in the field is configured as one of the following configurations:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot675us, the length of the lengthened downlink slot is equal to TslotPlus 166.67us, the duration T of the guard intervalGP25us, the length of the lengthened uplink time slot is equal to TslotPlus 83.33 us;
use of a conventional cyclic prefix T in a generic slotGP-normalEach generic slot contains 9 uplink or downlink symbols each of duration T, 8.33ussymbol66.67 us; alternatively, the general slot uses an extended cyclic prefix TGP-extendedEach generic slot contains 8 uplink or downlink symbols, each symbol having a duration T ═ 17.71ussymbol＝66.67us；
The lengthened downlink time slot comprises 2 downlink OFDM symbols with 16.67us of cyclic prefix besides OFDM symbols of a common downlink time slot, and the lengthened uplink time slot comprises 1 uplink symbol with 16.67us of cyclic prefix besides symbols of a common uplink time slot;
second configuration
The sum of M and N is 7, and the duration T of the general time slotslot667us, the length of the lengthened downlink timeslot is equal to TslotPlus 166.67us, the duration T of the guard intervalGP81us, the length of the lengthened uplink time slot is equal to TslotPlus 83.33 us;
when the conventional cyclic prefix is used in the general time slot, each general time slot comprises 9 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, where the cyclic prefix duration T of the first symbolGP-normal1Cyclic prefix duration T of other symbols 8.33usCP-normal27.29 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration TCP-extended＝16.67us；
The lengthened downlink time slot comprises 2 downlink OFDM symbols with 16.67us cyclic prefix besides the OFDM symbols of the common downlink time slot; the lengthened uplink time slot comprises 1 uplink symbol with 16.67us of cyclic prefix besides the symbol of the common uplink time slot.
7. The transmission method of claim 6,
the synchronization signal is transmitted on the last two OFDM symbols of the first downlink slot.
8. The transmission method of claim 4, wherein the duration of the field is 5ms, and the duration of each slot in the field is configured as one of the following configurations:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot675us, the length of the lengthened uplink slot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝25us；
Use of a conventional cyclic prefix T in a generic slotCP-normalEach generic slot contains 9 uplink or downlink symbols each of duration T, 8.33ussymbol66.67 us; alternatively, the general slot uses an extended cyclic prefix TCP-extendedEach generic slot contains 8 uplink or downlink symbols, each symbol having a duration T ═ 17.71ussymbol＝66.67us；
The lengthened uplink time slot comprises 3 uplink symbols with 16.67us of cyclic prefix besides the symbols of the common uplink time slot;
second configuration
The sum of M and N is 7, and the duration T of the general time slotslot667us, the length of the lengthened uplink timeslot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝81us；
When the conventional cyclic prefix is used in the general time slot, each general time slot comprises 9 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, where the cyclic prefix duration T of the first symbolCP-normal1Cyclic prefix duration T of other symbols 8.33usCP-normal27.29 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration TCP-extended＝16.67us；
The lengthened uplink time slot comprises 3 uplink symbols with 16.67us of cyclic prefix besides the symbols of the common uplink time slot.
9. A transmission method of time division duplex system signal, characterized by, in the duration of a half frame of the wireless frame, the base transceiver station sends the signal on M downlink time slots first, then does not send the signal on a guard interval, receive the signal on N uplink time slots, the said downlink time slot includes a lengthened downlink time slot, the other time slots, including general uplink time slot and general downlink time slot are the same long general time slot, the duration of the said lengthened time slot is greater than the general time slot, M, N is a positive integer; the synchronous signal is sent on the lengthened first downlink time slot; wherein,
within the duration of a half frame, the base station does not send signals on the guard interval after sending signals on a lengthened downlink time slot and M-1 common downlink time slots in sequence, then receives signals on N common uplink time slots, sends synchronous signals on the lengthened downlink time slot, and sends uplink random access signals on a plurality of continuous uplink time slots.
10. The transmission method of claim 9, wherein the duration of the field is 5ms, and the duration of each slot in the field is configured as one of the following configurations:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot675us, the length of the lengthened downlink slot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝25us；
Use of a conventional cyclic prefix T in a generic slotCP-normalEach generic slot contains 9 uplink or downlink symbols each of duration T, 8.33ussymbol66.67 us; alternatively, the general slot uses an extended cyclic prefix TCP-extendedEach generic slot contains 8 uplink or downlink symbols, each symbol having a duration T ═ 17.71ussymbol＝66.67us；
The lengthened downlink time slot comprises 3 downlink OFDM symbols with 16.67us cyclic prefix besides OFDM symbols of common downlink time slots;
second configuration
The sum of M and N is 7, and the duration T of the general time slotslot667us, the length of the lengthened downlink timeslot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝81us；
When the conventional cyclic prefix is used in the general time slot, each general time slot comprises 9 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, where the cyclic prefix duration T of the first symbolCP-normal1Cyclic prefix duration T of other symbols 8.33usCP-normal27.29 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration TCP-extended＝16.67us；
The lengthened downlink time slot comprises 3 downlink OFDM symbols with 16.67us cyclic prefix besides the OFDM symbols of the common downlink time slot.
11. A transmission method of time division duplex system signal, characterized by, in the duration of a half frame of the wireless frame, the base transceiver station sends the signal on M downstream time slots first, then does not send the signal on a guard interval, receive the signal on N upstream time slots, the said downstream time slot includes a lengthened downstream time slot, the other time slots, including general upstream time slot and general downstream time slot are the same long general time slot, the duration of the said lengthened time slot is greater than the general time slot, M, N is a positive integer; the synchronization signal is transmitted on the first generic downlink time slot TSO.
12. The transmission method of claim 11,
within the duration of a half frame, the base station sequentially sends signals on a first general downlink time slot and M-1 downlink time slots, wherein the M-1 downlink time slots comprise a lengthened downlink time slot, then no signal is sent on the guard interval, then the signals are received on the N general uplink time slots, and the synchronous signals are in the first general downlink time slot TSoAnd uplink random access signals are transmitted on any one or more continuous uplink time slots.
13. The transmission method of claim 12, wherein the duration of the field is 5ms, and the duration of each slot in the field is configured as one of the following configurations:
first configuration
The sum of M and N is 7, and the duration T of the general time slotslot675us, the length of the lengthened downlink slot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝25us；
Use of a conventional cyclic prefix T in a generic slotCP-normalEach generic slot contains 9 uplink or downlink symbols each of duration T, 8.33ussymbol66.67 us; alternatively, the general slot uses an extended cyclic prefix TCP-extendedEach generic slot contains 8 uplink or downlink symbols, each symbol having a duration T ═ 17.71ussymbol＝66.67us；
The lengthened downlink time slot comprises 3 downlink OFDM symbols with 16.67us cyclic prefix besides OFDM symbols of common downlink time slots;
second configuration
The sum of M and N is 7, and the duration T of the general time slotslot667us, the length of the lengthened downlink timeslot is equal to TslotPlus 250us, the duration T of the guard intervalGP＝81us；
When the conventional cyclic prefix is used in the general time slot, each general time slot comprises 9 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, where the cyclic prefix duration T of the first symbolCP-narmal1Cyclic prefix duration T of other symbols 8.33usCP-normal27.29 us; or, the extended cyclic prefix is used by the general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has a duration of Tsymbol66.67us, cyclic prefix duration TCP-extended＝16.67us；
The lengthened downlink time slot comprises 3 downlink OFDM symbols with 16.67us cyclic prefix besides the OFDM symbols of the common downlink time slot.
14. A transmission method of time division duplex-system signal is characterized in that in the time length of a wireless frame half frame, a base station does not send signal on the protection interval after sending signal on M general downlink time slots in sequence, then receives signal on N general uplink time slots, and a synchronous signal is in the first general downlink time slot TS0Uplink random access signals are sent on any one or more continuous uplink time slots; the duration of the half frame is 5ms, and the duration of each time slot in the half frame adopts one of the following configuration modes:
first configuration
The sum of M and N is 7, the time length T of the common time slotslot＝713.54us, duration T of the guard intervalGp＝5.22us；
The conventional cyclic prefix is used in general time slots, each general time slot comprises 10 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, duration of cyclic prefix TCP-normal4.69 us; alternatively, the extended cyclic prefix is used in general time slots, each of which contains 9 uplink or downlink symbols each having a duration of Tsymbol66.67us, cyclic prefix duration T of the first and second symbolsCP-extendedl13.02us, cyclic prefix duration T of the remaining symbolsCP-exlende2＝12.5us；
Second configuration
The sum of M and N is 7, and the duration T of the general time slotslat713.54us, the duration T of the guard intervalGP＝5.22us；
The conventional cyclic prefix is used in general time slots, each general time slot comprises 10 uplink or downlink symbols, and each symbol has the duration of Tsymnbol66.67us, duration of cyclic prefix TCP-normal4.69 us; or, the extended cyclic prefix is used by general time slots, each general time slot comprises 8 uplink or downlink symbols, and each symbol has the duration of Tsymbol66.67us, cyclic prefix duration T of the first and second symbolsCP-extended122.92us, cyclic prefix duration T of the remaining symbolsCP-extended2＝22.4us。
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| CN1449139A (en) * | 2002-04-03 | 2003-10-15 | 华为技术有限公司 | Method for transmitting high-speed data service based on time-division duplex mode |
| CN1452420A (en) * | 2002-04-19 | 2003-10-29 | 华为技术有限公司 | Radio communication method based on time division diplexing |
| WO2007047502A1 (en) * | 2005-10-14 | 2007-04-26 | Qualcomm Incorporated | Methods and apparatus for determining, communicating and using information including loading factors for interference control |
| CN101005305A (en) * | 2006-01-17 | 2007-07-25 | 上海原动力通信科技有限公司 | Transmitting method for time division duplex mobile communication system |
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| CN1449139A (en) * | 2002-04-03 | 2003-10-15 | 华为技术有限公司 | Method for transmitting high-speed data service based on time-division duplex mode |
| CN1452420A (en) * | 2002-04-19 | 2003-10-29 | 华为技术有限公司 | Radio communication method based on time division diplexing |
| WO2007047502A1 (en) * | 2005-10-14 | 2007-04-26 | Qualcomm Incorporated | Methods and apparatus for determining, communicating and using information including loading factors for interference control |
| CN101005305A (en) * | 2006-01-17 | 2007-07-25 | 上海原动力通信科技有限公司 | Transmitting method for time division duplex mobile communication system |
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