CN101262462B - Transmission method and device for downlink control information - Google Patents

Transmission method and device for downlink control information Download PDF

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Publication number
CN101262462B
CN101262462B CN200810006368.3A CN200810006368A CN101262462B CN 101262462 B CN101262462 B CN 101262462B CN 200810006368 A CN200810006368 A CN 200810006368A CN 101262462 B CN101262462 B CN 101262462B
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modulation
bit
information
downlink control
control information
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CN101262462A (en
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梁春丽
夏树强
戴博
郝鹏
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ZTE Corp
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ZTE Corp
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Abstract

The invention provides a delivering method and a device for downstream control information. The information delivering method comprises the following steps: step a, choosing two secondary synchronous short code sequences Si and Sj; step b, using at least part of the downstream control information to modulate Si and Sj to obtain modulation information; step c, mapping the modulation information in frequency domain onto corresponding subcarrier of secondary synchronous channel in an interwoven way for sending. The delivering method and the device for downstream control information of the invention carries downstream control information through modulated S-SCH (secondary synchronous channel), needing no sending on P-BCH, thereby ensuring no influence on searching process of microplots and P-BCH consistency of TDD system and FDD system.

Description

The sending method of Downlink Control Information and device
Technical field
The present invention relates to the communications field, in particular to a kind of sending method and device of Downlink Control Information.
Background technology
A key character of time division duplex (Time Division Duplex, TDD) system is that the subframe of transmitting for up-downgoing is configurable.The frame structure of LTE (Long Term Evolution, Long Term Evolution) system TDD mode, as shown in Figure 1.In this frame structure; a 10ms (307200Ts; 1ms=30720 Ts) radio frames is divided into the field of two 5ms, and it is 0.5ms (15360 Ts) time slot and 3 special time slots that each field comprises 8 length: descending pilot frequency time slot DwPTS (Downlink Pilot Time Slot), protection interval GP (Guard Period) and uplink pilot time slot UpPTS (Uplink PilotTime Slot).The length of these three each time slots of special time slot is configurable, but total length is 1ms (30720 Ts).The time slot of every two 0.5ms forms a subframe that length is 1ms, is numbered subframe #0～subframe #9, and wherein, subframe #1 and subframe #6 comprise above-mentioned said special time slot, and subframe #0 and subframe #5 and DwPTS are fixed as descending time slot.Also there is another kind of model F DD (Frequency Division Duplex, Frequency Division Duplexing (FDD)) in current LTE system.
Physical Control Format Indicator Channel can carry 2 bit informations, as OFDM (the Orthogonal Frequency DivisionMultiplexing that represents transmitting physical downlink channel control, abbreviation OFDM) quantity of symbol, in general subframe, the quantity that is used as the OFDM symbol of transmitting physical downlink channel control is 1, 2, 3, need 2 bit informations to represent, in DwPTS, the quantity that is used as the OFDM symbol of transmitting physical downlink channel control is 1, 2, only need 1 bit information just can represent, like this, Physical Control Format Indicator Channel in DwPTS can carry other information of 1 bit again.
Under this frame structure, the ratio of up-downgoing (referring to general uplink and downlink timeslot, non-special time slot) is relevant with switching cycle.When switching cycle is 5ms, and former and later two 5ms are when identical, and up-downgoing ratio has three kinds of option: DL: UL=1: 3/2: 2/3: 1; When the switching proportion of former and later two 5ms is different, current LTE also supports DL: UL=3: 5 switching proportion.When switching cycle is 10ms, because subframe #5 and DwPTS are fixed as descending sub frame, therefore, up-downgoing ratio also has three kinds of option: DL: UL=6: 3/7: 2/8: 1.Therefore, always have 7 kinds of up-downgoing ratio options, need 3 bits to represent.
Problem about up-downgoing switching proportion information (being up-downgoing percent information) in any transmission, current also do not have to come to a conclusion, wherein a kind of scheme is in the upper transmission of Dynamic Broadcast Channel D-BCH (Dynamic Broadcast Channel), but in realizing process of the present invention, inventor finds that user need to obtain by downlink physical control channel the positional information of Dynamic Broadcast Channel, the definite quantity information that need to know downlink physical mixed retransfer channel of Physical Downlink Control Channel position, the quantity information of downlink physical mixed retransfer channel is relevant to up-downgoing proportionate relationship again, and up-downgoing proportionate relationship obtains from Dynamic Broadcast Channel again, this has just produced a Deadlock, information all cannot be obtained.
Put forward another kind of solution is to be placed on the upper transmission of Physical Broadcast Channel P-BCH (Physical Broadcast Channel) for this reason, but in realizing process of the present invention, inventor finds that this will cause coding, modulation and the mapping of the P-BCH of TDD system and FDD system all different, and this will increase the complexity of P-BCH demodulation.
In addition, utilize P-BCH to send other Downlink Control Information, also may face similar problem.
Summary of the invention
The present invention aims to provide sending method and the device of up-downgoing percent information in a kind of tdd systems, causes the problem of demodulated complex Du Taigao to solve prior art P-BCH transmission Downlink Control Information.
In an embodiment of the present invention, provide a kind of sending method of Downlink Control Information, comprised the following steps: step a, chooses two auxiliary synchronous short code sequence S iand S j; Step b, is used at least a portion Downlink Control Information modulation S iand S jto obtain modulation intelligence; And step c, modulation intelligence being interweaved with being mapped on the corresponding subcarrier of auxiliary synchronization channel on frequency domain sends.
Preferably, Downlink Control Information is the up-downgoing percent information in tdd systems, and up-downgoing percent information is M bit, and at least a portion Downlink Control Information is m bit, and step b specifically comprises: m bit up-downgoing percent information is carried out to 2 m-PSK modulation, obtains a modulation symbol A; With A, be multiplied by respectively S iand S j, step c specifically comprises: the S on frequency domain, process A being modulated iand S jinterweave and be mapped on the corresponding subcarrier of auxiliary synchronization channel.
Preferably, Downlink Control Information is the up-downgoing percent information in tdd systems, up-downgoing percent information is M bit, and at least a portion Downlink Control Information is m bit, and step b specifically comprises: m bit up-downgoing percent information is carried out to chnnel coding and obtain the individual coded-bit of m '; The individual coded-bit of m ' is carried out to 2 m '-PSK modulation, obtains a modulation symbol A; With A, be multiplied by respectively S iand S j, step c specifically comprises: the S on frequency domain, process A being modulated iand S jinterweave and be mapped on the corresponding subcarrier of auxiliary synchronization channel.
Preferably, Downlink Control Information is the up-downgoing percent information in tdd systems, and up-downgoing percent information is M bit, and at least a portion Downlink Control Information is m bit, and step b specifically comprises: two parts before and after m bit up-downgoing percent information is divided into; Front m/2 bit information is carried out to 2 m/2-PSK modulation obtains modulation symbol A, and rear m/2 bit information is carried out to 2 m/2-PSK modulation obtains modulation symbol B; With A, be multiplied by S i, with B, be multiplied by S j, step c specifically comprises: on frequency domain, will pass through the S of A and B modulation iand S jinterweave and be mapped on the corresponding subcarrier of auxiliary synchronization channel.
Preferably, Downlink Control Information is the up-downgoing percent information in tdd systems, up-downgoing percent information is M bit, and at least a portion Downlink Control Information is m bit, and step b specifically comprises: m bit up-downgoing percent information is carried out to chnnel coding and obtain the individual coded-bit of m '; Two parts before and after m bit up-downgoing percent information is divided into; Front m '/2 bit information is carried out to 2 m '/2-PSK modulation obtains modulation symbol A, and rear m '/2 bit information is carried out to 2 m '/2-PSK modulation obtains modulation symbol B; With A, be multiplied by S i, with B, be multiplied by S j, step c specifically comprises: on frequency domain, will pass through the S of A and B modulation iand S jinterweave and be mapped on the corresponding subcarrier of auxiliary synchronization channel.
Preferably, auxiliary synchronization channel is n, also comprises: at least a portion Downlink Control Information is divided into n part; Then at least a portion Downlink Control Information of each part is performed step respectively to b and step c.
Preferably, up-downgoing percent information is wherein number of antennas information, system bandwidth information or cell size information, or the Downlink Control Information in frequency division duplex system.
In an embodiment of the present invention, also provide a kind of dispensing device of Downlink Control Information, having comprised: chosen module, for choosing two auxiliary synchronous short code sequence S iand S j; Modulation module, for being used at least a portion Downlink Control Information modulation S iand S jto obtain modulation intelligence; And mapping block, for modulation intelligence being interweaved with being mapped on the corresponding subcarrier of auxiliary synchronization channel on frequency domain, send.
Preferably, auxiliary synchronization channel is n, also comprises: at least a portion Downlink Control Information is divided into n part; Then at least a portion Downlink Control Information of each part is performed step respectively to b and step c.
Preferably, up-downgoing percent information is wherein number of antennas information, system bandwidth information or cell size information, or the Downlink Control Information in frequency division duplex system.
The sending method of the Downlink Control Information of above-described embodiment and device, S-SCH (auxiliary synchronization channel) by modulation carries Downlink Control Information, without sending on P-BCH, thereby guaranteed can not bring impact to cell search process, and guaranteed the consistency of the P-BCH of TDD system and FDD system.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the frame structure schematic diagram of tdd systems;
Fig. 2 shows according to the flow chart of the sending method of the Downlink Control Information of the embodiment of the present invention;
Fig. 3 shows according to the sending method schematic diagram of the up-downgoing switching proportion indication information of the embodiment of the present invention;
Fig. 4 shows according to the sending method schematic diagram of the up-downgoing switching proportion indication information of another embodiment of the present invention;
Fig. 5 shows according to the sending method schematic diagram of the up-downgoing switching proportion indication information of another embodiment of the present invention;
Fig. 6 shows according to the sending method schematic diagram of the up-downgoing switching proportion indication information of another embodiment of the present invention;
Fig. 7 shows the frame structure schematic diagram according to the frequency division duplex system of the embodiment of the present invention;
Fig. 8 shows according to the block diagram of the dispensing device of the Downlink Control Information of the embodiment of the present invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 2 shows according to the flow chart of the sending method of the Downlink Control Information of the embodiment of the present invention, comprises the following steps:
Step a, chooses two auxiliary synchronous short code sequence S iand S j, for example, S iand S jcan be 31 long m sequences.；
Step b, is used at least a portion Downlink Control Information modulation S iand S jto obtain modulation intelligence; And
Step c, modulation intelligence being interweaved with being mapped on the corresponding subcarrier of auxiliary synchronization channel on frequency domain sends.
This sending method is carried Downlink Control Information by the S-SCH (auxiliary synchronization channel) of modulation, without sending on P-BCH, thereby has guaranteed can not bring impact to cell search process, and has guaranteed the consistency of the P-BCH of TDD system and FDD system.
Preferably, Downlink Control Information is the up-downgoing percent information in tdd systems, and up-downgoing percent information is M bit, and at least a portion Downlink Control Information is m bit, and step b specifically comprises: m bit up-downgoing percent information is carried out to 2 m-PSK modulation, obtains a modulation symbol A; With A, be multiplied by respectively S iand S j, step c specifically comprises: the S on frequency domain, process A being modulated iand S jinterweave and be mapped on the corresponding subcarrier of auxiliary synchronization channel.
Fig. 3 shows according to the sending method schematic diagram of the up-downgoing switching proportion indication information of the embodiment of the present invention, and its process of transmitting specifically describes as follows:
If the up-downgoing switching proportion information bit that will carry by S-SCH is m (m≤M), this m bit is carried out to 2 m-PSK modulation, obtains a modulation symbol A, then with A, is multiplied by respectively S iand S j, the last S on frequency domain, process A being modulated iand S jinterweave and be mapped to the corresponding subcarrier of auxiliary synchronization channel and get on; Concrete, when m=3, can adopt 8PSK modulation.
Preferably, Downlink Control Information is the up-downgoing percent information in tdd systems, up-downgoing percent information is M bit, and at least a portion Downlink Control Information is m bit, and step b specifically comprises: m bit up-downgoing percent information is carried out to chnnel coding and obtain the individual coded-bit of m '; The individual coded-bit of m ' is carried out to 2 m '-PSK modulation, obtains a modulation symbol A; With A, be multiplied by respectively S iand S j, step c specifically comprises: the S on frequency domain, process A being modulated iand S jinterweave and be mapped on the corresponding subcarrier of auxiliary synchronization channel.
Fig. 4 shows according to the sending method schematic diagram of the up-downgoing switching proportion indication information of another embodiment of the present invention, and its process of transmitting specifically describes as follows:
If the up-downgoing switching proportion information bit that will carry by S-SCH is m (m≤M), this m bit is first carried out to chnnel coding and obtain the individual coded-bit of m ', then this m ' bit is carried out to 2 m '-PSK modulation, obtains a modulation symbol A, then with A, is multiplied by respectively S iand S j, the last S on frequency domain, process A being modulated iand S jinterweave and be mapped to the corresponding subcarrier of auxiliary synchronization channel and get on; Concrete, when m '=3, can adopt 8PSK modulation.
Preferably, Downlink Control Information is the up-downgoing percent information in tdd systems, and up-downgoing percent information is M bit, and at least a portion Downlink Control Information is m bit, and step b specifically comprises: two parts before and after m bit up-downgoing percent information is divided into; Front m/2 bit information is carried out to 2 m/2-PSK modulation obtains modulation symbol A, and rear m/2 bit information is carried out to 2 m/2-PSK modulation obtains modulation symbol B; With A, be multiplied by S i, with B, be multiplied by S j, step c specifically comprises: on frequency domain, will pass through the S of A and B modulation iand S jinterweave and be mapped on the corresponding subcarrier of auxiliary synchronization channel.
Fig. 5 shows according to the sending method schematic diagram of the up-downgoing switching proportion indication information of another embodiment of the present invention, and its process of transmitting specifically describes as follows:
If the up-downgoing switching proportion information bit that will carry by S-SCH is m (m≤M), two parts (now requiring m to be divided exactly by 2) before and after this m bit is divided into, carry out 2 to front m/2 bit information m/2-PSK modulation obtains modulation symbol A, and rear m/2 bit information is carried out to 2 m/2-PSK modulation obtains modulation symbol B, then A is multiplied by S i, B is multiplied by S j, finally on frequency domain, will pass through respectively the S that A and B modulate iand S jinterweave and be mapped to the corresponding subcarrier of auxiliary synchronization channel and get on; Concrete, work as m=4, during m/2=2, can adopt QPSK modulation.
Preferably, Downlink Control Information is the up-downgoing percent information in tdd systems, up-downgoing percent information is M bit, and at least a portion Downlink Control Information is m bit, and step b specifically comprises: m bit up-downgoing percent information is carried out to chnnel coding and obtain the individual coded-bit of m '; Two parts before and after m bit up-downgoing percent information is divided into; Front m '/2 bit information is carried out to 2 m '/2-PSK modulation obtains modulation symbol A, and rear m '/2 bit information is carried out to 2 m '/2-PSK modulation obtains modulation symbol B; With A, be multiplied by S i, with B, be multiplied by S j, step c specifically comprises: on frequency domain, will pass through the S of A and B modulation iand S jinterweave and be mapped on the corresponding subcarrier of auxiliary synchronization channel.
Fig. 6 shows according to the sending method schematic diagram of the up-downgoing switching proportion indication information of another embodiment of the present invention, and its process of transmitting specifically describes as follows:
If the up-downgoing switching proportion information bit that will carry by S-SCH is m (m≤M), this m bit is first carried out to chnnel coding and obtain the individual coded-bit of m ', two parts (now requiring m ' to be divided exactly by 2) before and after this m ' bit is divided into, carry out 2 to front m '/2 bit information m '/2-PSK modulation obtains modulation symbol A, and rear m '/2 bit information is carried out to 2 m '/2-PSK modulation obtains modulation symbol B, then A is multiplied by S i, B is multiplied by S j, finally on frequency domain, will pass through respectively the S that A and B modulate iand S jinterweave and be mapped to the corresponding subcarrier of auxiliary synchronization channel and get on; Concrete, when m '=4, during m '/2=2, can adopt QPSK modulation.
The thought of above preferred embodiment is that the bit information that represents up-downgoing ratio in TDD system is carried by the S-SCH modulating, and this has solved the transmission problem of up-downgoing percent information.
Preferably, auxiliary synchronization channel is n, also comprises: at least a portion Downlink Control Information is divided into n part; Then at least a portion Downlink Control Information of each part is performed step respectively to b and step c.
Preferably, up-downgoing percent information is wherein number of antennas information, system bandwidth information or cell size information, or the Downlink Control Information in frequency division duplex system.In FDD system, primary synchronization channel P-SCH, auxiliary synchronization channel S-SCH lay respectively on the last and penultimate symbol of time slot #0 and time slot #10, and as shown in Figure 7, the method for its send and receive signal is with previously described identical.
Although the elaboration that it should be noted that above summary of the invention is only the processing on an auxiliary synchronization channel, its basic principle can expand in two auxiliary synchronization channels in a radio frames and go.Such as two parts before and after the m bit that will send is divided into, carry out 2 to front m/2 bit information m/2-PSK modulation obtains modulation symbol A, and rear m/2 bit information is carried out to 2 m/2-PSK modulation obtains modulation symbol B, then, with the S-SCH on subframe #0 in A modulation radio frames, with B, removes to modulate the S-SCH on subframe #5 in radio frames.
What adopt the above embodiment of the present invention carries the method for TDD system up-downgoing switching proportion information by S-SCH, can not bring impact to cell search process, and guarantee the consistency of the P-BCH of TDD system and FDD system.
The sending method shown in accompanying drawing 3 take below as example, provide a specific embodiment of up-downgoing percent information method of reseptance in TDD system, suppose m=3 here, during 8PSK modulation, the mapping relations of information bit and modulation symbol are as shown in the table.
The mapping relations table of information bit and modulation symbol during 8PSK modulation
If the S-SCH frequency domain sequence receiving be R=(r (0), r (1) ..., r (61)):
Step 1: the S-SCH signal receiving is carried out to coherent demodulation, obtain the two sequences S that transmitting terminal sends i 'and S j ', according to the mapping ruler of the S-SCH sequence of making an appointment and community group number information, thereby obtain community group number information, complete cell search process;
Step 2: the two sequences S that demodulation obtains according to step 1 i 'and S j ', obtain sequence S ' after frequency-domain-interleaving=(s (0) ', s (1) ' ..., s (61) ')=(s i '(0), s j '(0) ..., s i '(30), s j '(30));
Step 3: S ' is multiplied by respectively to 8PSK and modulates corresponding constellation point, obtain
M k = e j π 4 k S ′ , k = 0,1,2 , . . . , 7
Step 4: calculate following metric:
D k = | M k - R | 2 = Σ m = 0 61 | e j π 4 k × s ( m ) ′ - r ( m ) | 2
Step 5: find min{D kcorresponding k value, the 8PSK information mapping table shown in 6, can obtain switching proportion information bit (a corresponding to corresponding k value with reference to the accompanying drawings 0, a 1, a 2).
Obviously, the indication information of this embodiment up-downgoing switching proportion in can carrying TDD system, can also extend to other Downlink Control Information, as number of antennas information.
Fig. 8 shows according to the block diagram of the dispensing device of the Downlink Control Information of the embodiment of the present invention, comprising:
Choose module 10, for choosing two auxiliary synchronous short code sequence S iand S j;
Modulation module 20, for being used at least a portion Downlink Control Information modulation S iand S jto obtain modulation intelligence; And
Mapping block 30, sends for modulation intelligence being interweaved with being mapped on the corresponding subcarrier of auxiliary synchronization channel on frequency domain.
The dispensing device of this Downlink Control Information carries Downlink Control Information by the S-SCH (auxiliary synchronization channel) of modulation, without sending on P-BCH, thereby guaranteed can not bring impact to cell search process, and guaranteed the consistency of the P-BCH of TDD system and FDD system.
Preferably, auxiliary synchronization channel is n, also comprises: at least a portion Downlink Control Information is divided into n part; Then at least a portion Downlink Control Information of each part is performed step respectively to b and step c.
Preferably, up-downgoing percent information is wherein number of antennas information, system bandwidth information or cell size information, or the Downlink Control Information in frequency division duplex system.
From above description, can find out, above-described embodiment carries for example method of TDD system up-downgoing switching proportion information of Downlink Control Information by S-SCH, can not bring impact to cell search process, and has guaranteed the consistency of the P-BCH of TDD system and FDD system.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (6)

1. a sending method for Downlink Control Information, is characterized in that, comprises the following steps:
Step a, chooses two auxiliary synchronous short code sequence S iand S j, wherein, i, j is nonnegative integer;
Step b, is used Downlink Control Information modulation S described at least a portion iand S jto obtain modulation intelligence; And
Step c, on frequency domain, described modulation intelligence being interweaved with being mapped on the corresponding subcarrier of auxiliary synchronization channel sends;
Wherein, described Downlink Control Information is the up-downgoing percent information in tdd systems;
Wherein, at described up-downgoing percent information, be M bit, Downlink Control Information is in the situation of m bit described at least a portion, described method comprises:
Step b specifically comprises: Downlink Control Information described in m bit is carried out to 2 m-PSK modulation, obtains a modulation symbol A; With A, be multiplied by respectively S iand S j, step c specifically comprises: the S on frequency domain, process A being modulated iand S jinterweave and be mapped on the corresponding subcarrier of described auxiliary synchronization channel, wherein, M and m are positive integer, and m≤M;
Or step b specifically comprises: Downlink Control Information described in m bit is carried out to chnnel coding and obtain m' coded-bit, wherein, m' is positive integer; A described m' coded-bit is carried out to 2 m'-PSK modulation, obtains a modulation symbol A; With A, be multiplied by respectively S iand S j, step c specifically comprises: the S on frequency domain, process A being modulated iand S jinterweave and be mapped on the corresponding subcarrier of described auxiliary synchronization channel, wherein, M and m are positive integer, and m≤M;
Or step b specifically comprises: two parts before and after Downlink Control Information described in m bit is divided into; Front m/2 bit information is carried out to 2 m/2-PSK modulation obtains modulation symbol A, and rear m/2 bit information is carried out to 2 m/2-PSK modulation obtains modulation symbol B; With A, be multiplied by S i, with B, be multiplied by S j, step c specifically comprises: on frequency domain, will pass through the S of A and B modulation iand S jinterweave and be mapped on the corresponding subcarrier of described auxiliary synchronization channel, wherein, M and m/2 are positive integer, and m≤M;
Or step b specifically comprises: Downlink Control Information described in m bit is carried out to chnnel coding and obtain m' coded-bit, wherein, m'/2 are positive integer; Two parts before and after Downlink Control Information described in m bit is divided into; Front m'/2 bit information is carried out to 2 m'/2-PSK modulation obtains modulation symbol A, and rear m'/2 bit information is carried out to 2 m'/2-PSK modulation obtains modulation symbol B; With A, be multiplied by S i, with B, be multiplied by S j, step c specifically comprises: on frequency domain, will pass through the S of A and B modulation iand S jinterweave and be mapped on the corresponding subcarrier of described auxiliary synchronization channel, wherein, M and m are positive integer, and m≤M.
2. sending method according to claim 1, is characterized in that, described auxiliary synchronization channel is n, also comprises: described at least a portion Downlink Control Information is divided into n part, and wherein, n is positive integer;
Then described at least a portion Downlink Control Information of each part is performed step respectively to b and step c.
3. sending method according to claim 2, is characterized in that, described up-downgoing percent information is wherein number of antennas information, system bandwidth information or cell size information, or the Downlink Control Information in frequency division duplex system.
4. a dispensing device for Downlink Control Information, is characterized in that, comprising:
Choose module, for choosing two auxiliary synchronous short code sequence S iand S j, wherein, i, j is nonnegative integer;
Modulation module, for being used Downlink Control Information modulation S described at least a portion iand S jto obtain modulation intelligence; And
Mapping block, sends for described modulation intelligence being interweaved with being mapped on the corresponding subcarrier of auxiliary synchronization channel on frequency domain;
Wherein, described Downlink Control Information is the up-downgoing percent information in tdd systems;
Wherein, at described up-downgoing percent information, be M bit, Downlink Control Information is in the situation of m bit described at least a portion,
Described modulation module also for: Downlink Control Information described in m bit is carried out to 2 m-PSK modulation, obtains a modulation symbol A; With A, be multiplied by respectively S iand S j, described mapping block also for: will be through the S of A modulation on frequency domain iand S jinterweave and be mapped on the corresponding subcarrier of described auxiliary synchronization channel, wherein, M and m are positive integer, and m≤M;
Or, described modulation module also for: Downlink Control Information described in m bit is carried out to chnnel coding and obtain m' coded-bit, wherein, m' is positive integer; A described m' coded-bit is carried out to 2 m'-PSK modulation, obtains a modulation symbol A; With A, be multiplied by respectively S iand S j, described mapping block also for: will be through the S of A modulation on frequency domain iand S jinterweave and be mapped on the corresponding subcarrier of described auxiliary synchronization channel, wherein, M and m are positive integer, and m≤M;
Or, described modulation module also for: by Downlink Control Information described in m bit be divided into before and after two parts; Front m/2 bit information is carried out to 2 m/2-PSK modulation obtains modulation symbol A, and rear m/2 bit information is carried out to 2 m/2-PSK modulation obtains modulation symbol B; With A, be multiplied by S i, with B, be multiplied by S j, described mapping block also for: will be through the S of A and B modulation on frequency domain iand S jinterweave and be mapped on the corresponding subcarrier of described auxiliary synchronization channel, wherein, M and m/2 are positive integer, and m≤M;
Or, described modulation module also for: Downlink Control Information described in m bit is carried out to chnnel coding and obtain m' coded-bit, wherein, m'/2 are positive integer; Two parts before and after Downlink Control Information described in m bit is divided into; Front m'/2 bit information is carried out to 2 m'/2-PSK modulation obtains modulation symbol A, and rear m'/2 bit information is carried out to 2 m'/2-PSK modulation obtains modulation symbol B; With A, be multiplied by S i, with B, be multiplied by S j, described mapping block also for: will be through the S of A and B modulation on frequency domain iand S jinterweave and be mapped on the corresponding subcarrier of described auxiliary synchronization channel, wherein, M and m are positive integer, and m≤M.
5. dispensing device according to claim 4, is characterized in that, described auxiliary synchronization channel is n, and described at least a portion Downlink Control Information is divided into n part, and wherein, n is positive integer;
Described modulation module and described mapping block are also for carrying out respectively modulation and mapping to described at least a portion Downlink Control Information of each part.
6. dispensing device according to claim 5, is characterized in that, described up-downgoing percent information is wherein number of antennas information, system bandwidth information or cell size information, or the Downlink Control Information in frequency division duplex system.
CN200810006368.3A 2008-02-29 2008-02-29 Transmission method and device for downlink control information Expired - Fee Related CN101262462B (en)

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