CN101547518A - Equipment and method for allocating distributed channel - Google Patents

Abstract

A method for mapping a distributed channel comprises the following steps that: a base station indicates number n of OFDM symbols occupied by a control channel; and according to the n, the N OFDM symbols in one TTI are used for determining the number of OFDM transmitted by a first sub-band and the number of OFDM transmitted by a second sub-band, wherein the N is the number of the OFDM symbols comprised in the TTI; and n is the first several number of the OFDM symbols in the TTI.

Description

The equipment and the method for assignment profile formula channel

Technical field

The present invention relates to wireless communication system, relate to the equipment and the method for the assignment profile formula channel in wireless communication system in particular.

Background technology

3GPP standardization body is carrying out the formulation of new generation of wireless communication standard, and this standard is called LTE.Its downlink transfer technology is based on OFDM (OFDM); Its uplink technology inserts (SCFDMA) based on single-carrier frequency division multiple access.The LTE system comprises two types frame structure, and the frame structure Class1 adopts Frequency Division Duplexing (FDD) (FDD), and frame structure type 2 adopts time division duplex (TDD).

Fig. 1 is the frame structure of LTE FDD system, and the time span of radio frames (radio frame) is 307200 * T _s=10ms, it is 15360T that each radio frames is divided into 20 length _sThe time slot of=0.5ms, the index range of time slot is 0～19.Each time slot comprises a plurality of OFDM symbols, and the CP of OFDM symbol has two kinds, promptly general CP and lengthening CP.Use the time slot of general CP to comprise 7 OFDM symbols, use the time slot of lengthening CP to comprise 6 OFDM symbols.Each subframe is made of two continuous time slot, and promptly k subframe comprises time slot 2k and time slot 2k+1.

Fig. 2 is the frame structure of LTE TDD system.Each length is 307200 * T _sIt is 153600 * T that the radio frames of=10ms is divided into two length _sThe field of=5ms.It is 15360T that each field comprises 8 length _sThe time slot of=0.5ms and 3 special domain, i.e. descending pilot frequency time slot (DwPTS), protection be (GP) and uplink pilot time slot (UpPTS) at interval, the length of these 3 special domain be 30720T _s=1ms.Each time slot comprises a plurality of OFDM symbols, and the CP of OFDM symbol has two kinds, promptly general CP and lengthening CP.Use the time slot of general CP to comprise 7 OFDM symbols, use the time slot of lengthening CP to comprise 6 OFDM symbols.Each subframe is made of two continuous time slot, and promptly k subframe comprises time slot 2k and time slot 2k+1.Subframe 1 and subframe 6 comprise 3 above-mentioned special domain.According to the discussion result of present 3GPP normal structure to the LTE standard, subframe 0, subframe 5 and DwPTS are fixed for downlink transfer; To the 5ms change-over period, UpPTS, subframe 2 and subframe 7 are fixed for uplink, and to the 10ms change-over period, UpPTS, subframe 2 are fixed for uplink.

According to the discussion result of current LTE TDD, UpPTS can comprise 1 or 2 SCFDMA symbols.To general CP structure, DwPTS can comprise 3,9,10,11 or 12 OFDM symbols; To lengthening CP structure, DwPTS can comprise 3,8,9 or 10 OFDM symbols.

According to the discussion result of current LTE, down control channel transmits in preceding n OFDM symbol of descending sub frame.In the FDD system, to the MBSFN subframe, the value of n is 1 or 2; To other subframes, n gets a value in 1,2 and 3.In the TDD system, to the MBSFN subframe, the value of n is 1 or 2; To subframe 1 and subframe 6, i.e. the subframe at DwPTS place, the value of n is 1 or 2; To other subframes, n gets a value in 1,2 and 3.The number n of the OFDM symbol that base station indication control channel takies, for example be used to transmit the value of said n at Physical Control Format Indicator Channel (PCFICH), thus in preceding n OFDM symbol transmitting physical downlink channel control (PDCCH) and the automatic repeat requests of physical mixed (HARQ) indicating channel (PHICH).Here, PCFICH transmits in first OFDM symbol of subframe, and PDCCH obtains by making up one or more control channel unit (CCE).

According to the discussion result of current LTE, the physics running time-frequency resource is divided into a plurality of Physical Resource Block (PRB).Each Physical Resource Block comprises M continuous sub-carriers on frequency domain, comprise simultaneously N continuous symbol in time, to descending be the OFDM symbol, to up be the SCFDMA symbol.According to the discussion result of current LTE, the value of M is 12, and the value of N depends on the OFDM symbol in the time slot or the number of SCFDMA symbol.Virtual resource blocks (VRB) is abstract to channel resource on Physical Resource Block, and VRB is divided into distributed virtual resource block (DVRB) and local formula virtual resource blocks (LVRB).

The mapping problems of distributing virtual Resource Block to physical resource mainly is discussed here.According to the discussion result of current LTE, distributing virtual Resource Block n _VRBBe to be mapped to Physical Resource Block n _PRB=f (n _VRB, n _s), n here _sBe the index of time slot in radio frames, and the distributing virtual Resource Block is mapped to different Physical Resource Block in two time slots of a subframe.According to this method, on two sub-frequency bands in distributing virtual resource block mapping to a subframe, the number of sub carrier wave in the sub-band equal in the Physical Resource Block number of sub carrier wave; From the time, take before

Data running time-frequency resource on first sub-band on the individual OFDM symbol, and after taking

Data running time-frequency resource on second sub-frequency bands on the individual OFDM symbol.Be the back that the conversion of the sub-band that takies of distributing virtual Resource Block occurs in first time slot in the subframe, in other words conj.or perhaps from the

The sub-band of individual OFDM sign-on transformed mappings.Here Be the number of the OFDM symbol that comprises of each time slot, and to the OFDM symbol in the subframe since 0 continuity index, promptly index is 0,1,2 ...,

Be the schematic diagram of this distributing virtual resource block mapping method as shown in Figure 3.Here be example with general CP frame structure, each time slot comprises 7 OFDM symbols.Because general subframe to FDD and TDD, PDCCH is transmission in the individual OFDM symbol of preceding n (1,2 or 3) in subframe, promptly in preceding n OFDM symbol of first time slot of subframe, transmit, so the number of the OFDM symbol that can be used for transfer of data of first time slot in the subframe is 7-n, and all 7 OFDM symbols of second time slot in the subframe may be used to transfer of data.Like this, the OFDM symbol numbers that is used for transfer of data of first time slot is lacked n than second time slot.As shown in Figure 3, example one, example two and example three are respectively the mapping schematic diagrames of distribution virtual resource blocks when n equals 1,2 and 3.This distributing virtual resource block mapping method based on the boundary of time slot frequency hopping is to transmit in two sub-frequency bands that keep at a certain distance away though guaranteed downlink data, and the physical resource number that is used for transfer of data in two sub-frequency bands is unequal.Obviously when be used in two sub-frequency bands transfer of data physical resource number when equal, the frequency diversity performance is best, so based on the distributing virtual resource block mapping method of boundary of time slot frequency hopping certain performance loss is arranged.

According to the discussion result of current LTE TDD, DwPTS is a special descending time slot, because a part of symbol in subframe 1 and/or the subframe 6 is used to constitute UpPTS and protection interval, the length of DwPTS can be less than the length of general descending sub frame.In addition, primary synchronization channel (P-SCH) is in the intermediate conveyor of the 3rd the OFDM symbol of DwPTS, and control channel can take preceding 1 or 2 OFDM symbols of DwPTS.Above factor all causes the control channel in the DwPTS different with the design of general descending sub frame with the data channel design.How in DwPTS, to shine upon the distributing virtual Resource Block to the physics running time-frequency resource? in present standardization meeting, not relevant discussion.

Summary of the invention

The purpose of this invention is to provide a kind of in wireless communication system the equipment and the method for assignment profile formula channel.

According to an aspect of of the present present invention, a kind of method of shining upon distributed channel comprises the steps:

A) number n of the OFDM symbol that takies of base station indication control channel;

B) according to n, N OFDM symbol among the TTI determined with the number of the OFDM of first sub-band transmission with the number of the OFDM of second sub-band transmission wherein, N is the number of the OFDM symbol that comprises in the TTI, n is the preceding several OFDM symbols in the TTI.

According to another aspect of the present invention, a kind of method of reseptance of ofdm system, total total N OFDM symbol in a TTI, comprise at least be used for transmitting control channel n OFDM symbol and be used for M OFDM symbol of transmitting user data, it is characterized in that:

Obtain being used for the number n of OFDM symbol of transmitting control channel;

Receive n OFDM symbol of transmitting control channel and the certain customers' data among the TTI with first sub-band;

Receive remaining users data among the described TTI with second sub-band, wherein with second sub-band receive the OFDM symbolic number with the difference of n variable or utilize at least n might value mean value n fix, wherein, N is the number of the OFDM symbol that comprises in the TTI, and n is the preceding several OFDM symbols in the TTI.

According to another aspect of the present invention, a kind of sending method of ofdm system, total total N OFDM symbol in a TTI comprises being used for n OFDM symbol of transmitting control channel at least, is used for M OFDM symbol of transmitting user data, it is characterized in that:

Transmission is used for the number n of OFDM symbol of transmitting control channel;

Send the OFDM symbol with first sub-band;

Send the OFDM symbol with second sub-band afterwards, wherein with second sub-band send the OFDM symbolic number with the difference of n variable or utilize at least n might value mean value n fix, wherein, N is the number of the OFDM symbol that comprises in the TTI, and n is the preceding several OFDM symbols in the TTI.

According to another aspect of the present invention, a kind of method of reseptance of ofdm system, total total N OFDM symbol in a TTI, at least comprise and be used for n OFDM symbol of transmitting control channel, be used for M OFDM symbol of transmitting user data, it is characterized in that: in a TTI in N-2 the OFDM symbol of back, the symbolic number that receives OFDM with first sub-band is Duoed 1 or equal or 1 less than the symbolic number that receives OFDM with second sub-band, wherein, N is the number of the OFDM symbol that comprises in the TTI, and n is the preceding several OFDM symbols in the TTI.

According to another aspect of the present invention, a kind of method of shining upon distributed channel in DwPTS comprises step:

A) base station sends PCFICH on first OFDM symbol of DwPTS, the number n of the OFDM symbol that the indication control channel takies;

B) base station sends descending control signaling in preceding n the OFDM symbol of DwPTS;

C) send downlink data on the distributed channel of base station in DwPTS, here, distributed channel is mapped on two sub-frequency bands of DwPTS, and the sub-band that takies in first time slot back conversion of DwPTS.

According to another aspect of the present invention, the equipment of distributed channel is handled in a kind of base station, comprises emitter, also comprises:

A) distributed channel mapping controller is used to control the position that distributed channel is mapped to the sub-band of two sub-frequency bands and transformed mappings;

B) physical channel multiplexer is used to accept the control of distributed channel mapping controller, realizes the mapping to distributed channel.

According to another aspect of the present invention, a kind of subscriber equipment is handled the equipment of distributed channel, comprises receiving system, also comprises:

A) distributed channel is separated the mapping controller, is used to be controlled at receive the position that data-signal and conversion receive the sub-band of data on two sub-frequency bands of distributed channel mapping;

B) physical channel demodulation multiplexer is used to accept the control that distributed channel is separated the mapping controller, realizes the mapping of separating to distributed channel.

Description of drawings

Fig. 1 is the frame structure of LTE FDD;

Fig. 2 is the frame structure of LTE TDD;

Fig. 3 is the distributing virtual resource block mapping schematic diagram of general subframe;

Fig. 4 is the equipment that distributed channel is handled in the base station;

Fig. 5 is the equipment that subscriber equipment is handled distributed channel;

Fig. 6 is the distributing virtual resource block mapping schematic diagram one among the DwPTS;

Fig. 7 is the distributing virtual resource block mapping schematic diagram two among the DwPTS.

Fig. 8 is the distributing virtual resource block mapping schematic diagram three among the DwPTS

Embodiment

The present invention proposes a kind of method of shining upon the distributing virtual Resource Block to the physics running time-frequency resource, it both can be used for the DwPTS time slot of LTE TDD system, also can be used for general descending sub frame.

Method of the present invention is that a distributing virtual resource block mapping is arrived on the two interior sub-frequency bands of Transmission Time Interval (TTI), here, number of sub carrier wave in each sub-band equals the number of sub carrier wave in the Physical Resource Block, and each sub-band the frequency location with a Physical Resource Block is identical respectively.Comprise N OFDM symbol in the note TTI, and preceding n OFDM symbol in the TTI is used for transmitting control channel.With the LTE system is example, and to general descending sub frame, the length of TTI equals the number of the OFDM symbol of general descending sub frame; And to DwPTS, TTI length just equals the number of the OFDM symbol of DwPTS.To general descending sub frame, the value of n is 1,2 or 3; To the DwPTS of TDD, the value of n is 1 or 2.Below to the OFDM symbol in the TTI since 0 continuity index, promptly index is 0,1,2 ..., N-1.

The number of remembering the OFDM symbol that comprises in the time slot is

The method of first kind of mapping distributing virtual Resource Block is on two sub-frequency bands in distributing virtual resource block mapping to a TTI, and from the $N_{\mathrm{hop}}=N_{\mathrm{symb}}^{\mathrm{DL}}$ Individual OFDM sign-on changes the sub-band of mapping; In other words, at preceding N _HopTake data running time-frequency resource on first sub-band on the individual OFDM symbol, and take back N-N _HopData running time-frequency resource on second sub-frequency bands on the individual OFDM symbol.Adopt this method, the conversion of the sub-band that the distributing virtual Resource Block takies is the back that occurs in first time slot in the TTI.With LTE TDD system is example, and the length of DwPTS is less than general descending sub frame, so the number of the OFDM symbol that the distributing virtual Resource Block takies in second sub-frequency bands may be fewer.

Remember the OFDM symbol that the control channel in the TTI takies number n might value mean value be n.With the LTE system is example, to general descending sub frame, n=2; To DwPTS, n=1.5.The method of second kind of mapping distributing virtual Resource Block is on two sub-frequency bands in distributing virtual resource block mapping to a TTI, and from the

Individual OFDM sign-on changes the sub-band of mapping, in other words, and at preceding N _HopTake data running time-frequency resource on first sub-band on the individual OFDM symbol, and take back N-N _HopData running time-frequency resource on second sub-frequency bands on the individual OFDM symbol.Here, N _HopComputing formula also can have other forms, for example

Deng, these form differences but the identical formula of essence belongs to scope of the present invention automatically.Adopt this method, the frequency hopping position of mapping distributing virtual Resource Block does not rely on the value of n, does not promptly rely on the reception to PCFICH, thereby is not subjected to PCFICH to detect wrong influence.Like this, be example with the LTE system, according to method of the present invention, to general descending sub frame and DwPTS, the method for mapping distributing virtual Resource Block is from the

Individual OFDM sign-on changes the sub-band of mapping.N _HopThe another kind of form of computing formula is

The method of the third mapping distributing virtual Resource Block is on two sub-frequency bands in distributing virtual resource block mapping to a TTI, and the number n of the OFDM symbol that each possible control channel is taken, determine the frequency hopping position of mapping distributing virtual Resource Block respectively, thereby the number that guarantees to be used in two sub-frequency bands of distributing virtual resource block mapping the OFDM symbol of transfer of data equates or differs one.Specifically, the method for mapping distributing virtual Resource Block is the

(perhaps

) individual OFDM sign-on changes the sub-band of mapping.This method depends on the correct reception to PCFICH, and subscriber equipment receives PCFICH, the number n of the OFDM symbol of controlled channel occupancy, thus obtain the frequency hopping transfer point of distributing virtual resource block mapping according to method of the present invention.

To the TDD system, between downlink transfer and uplink, need to be provided with certain free time (GP), its length depends on propagation delay and avoids factors such as interference between the neighbor cell.For example, in LTE TDD system, free time is to be arranged in subframe 1 and subframe 6, free time length variation, cause the variation of the OFDM symbol numbers of DwPTS.To general CP structure, DwPTS can comprise 3,9,10,11 or 12 OFDM symbols; To lengthening CP structure, DwPTS can comprise 3,8,9 or 10 OFDM symbols.The method of the 4th kind of mapping distributing virtual Resource Block is on two sub-frequency bands in distributing virtual resource block mapping to a TTI, and fixing from N _HopIndividual OFDM sign-on changes the sub-band of mapping, the N here _HopThe variation with the OFDM symbol numbers of DwPTS does not change.Here, to general CP and two kinds of CP structures of lengthening CP, N can be set respectively _HopValue, also can define identical N _HopValue.In order to optimize the performance of the distributed channel under the various DwPTS length situations, N _HopShould take all factors into consideration the configuration of the best frequency modulation transfer point of various DwPTS length, thereby select a suitable value.In addition, N _HopShould satisfy when system configuration user specific reference signals (UE specific RS), under the situation of various DwPTS symbol lengths, can both support the distributed data channel, promptly in two hop region of distributed data channel, all have user's specific reference signals.The benefit of the method for this mapping distributing virtual Resource Block is N _HopThe variation with the OFDM symbol numbers of DwPTS does not change, and this helps the design of simplified system.

Be the equipment that distributed channel is handled in the base station as shown in Figure 4.At first the base station is identified for the number n of the OFDM symbol of transmitting control channel according to the current demand that sends control signaling, i.e. the value of PCFICH (401), and encoded and modulation waits (402) operation, input physical channel multiplexer (408); Next the base station generates descending control signaling (403), and encoded and modulation waits (404) operation, input physical channel multiplexer (408).Next, the base station is to downlink data (405), and encoded and modulation is imported physical channel multiplexer (408) after waiting (406) operation.Here,, under the control of distributed channel mapping controller (407),, it is mapped on two sub-frequency bands, remembers that the OFDM symbol numbers in the TTI is N, then from N according to method of the present invention to the data of distributed channel _HopThe sub-band of individual OFDM sign-on transformed mappings.Here, to the method for first kind of mapping distributing virtual Resource Block, $N_{\mathrm{hop}}=N_{\mathrm{symb}}^{\mathrm{DL}};$ To the method for second kind of mapping distributing virtual Resource Block,

To the method for the third mapping distributing virtual Resource Block,

To the method for the 4th kind of mapping distributing virtual Resource Block, N _HopThe performance of the distributed data channel when being comprehensive various DwPTS and the factors such as structure of user's specific reference signals are determined.To general descending sub frame, N equals the OFDM total number of symbols of descending sub frame; To DwPTS, N equals the number of the OFDM symbol among the DwPTS.Next, downstream data channel and down control channel are launched through emitter (409) after physical channel multiplexer (408) is multiplexing.

Be the equipment that subscriber equipment is handled distributed channel as shown in Figure 5.At first subscriber equipment receives through receiving system (509), in physical channel demodulation multiplexer (508), demultiplexing goes out PCFICH, after operation such as demodulation sign indicating number (502), obtain the value (501) of PCFICH, promptly be used for the number n of the OFDM symbol of transmitting control channel; Next, the subscriber equipment demultiplexing goes out possible PDCCH, and to each possible PDCCH, after operation such as demodulation sign indicating number (504), whether base stations detected is that it has sent descending control signaling (503).Here suppose that the base station is dispatching user facility distributed downlink data.Next, separate at distributed channel under the control of mapping controller (507),, on two sub-frequency bands of distributed channel mapping, receive data-signal, remember that the OFDM symbol numbers in the TTI is N, then from N according to method of the present invention _HopThe sub-band that individual OFDM sign-on transform data signal receives.Here, to the method for first kind of mapping distributing virtual Resource Block, $N_{\mathrm{hop}}=N_{\mathrm{symb}}^{\mathrm{DL}};$ To the method for second kind of mapping distributing virtual Resource Block,

To the method for the third mapping distributing virtual Resource Block,

To the method for the 4th kind of mapping distributing virtual Resource Block, N _HopBe that the performance of distributed data channel in the comprehensive various DwPTS and the structure of user's specific reference signals are determined.Then, subscriber equipment is operated the distributed data signal that demultiplexing goes out through (506) such as demodulation sign indicating numbers, finally obtain the downlink data (505) that the base station sends, perhaps Cyclic Redundancy Check failure, user equipment requests data re-transmission.

Embodiment

This part has provided two embodiment of this invention, and is too tediously long for fear of the description that makes this patent, in the following description, omitted the detailed description of function that the public is known or device etc.

Embodiment one

An example of the method for mapping distributing virtual Resource Block of the present invention is described in the present embodiment.DwPTS with TDD is an example, and the value that is used for the OFDM symbol numbers n of transmitting control channel is 1 or 2.Here suppose that DwPTS comprises N=9 OFDM symbol, then the index of each OFDM symbol is followed successively by 0,1,2 ..., 8.Here be example with general CP frame structure, promptly a time slot comprises 7 OFDM symbols.Method of the present invention be a distributing virtual resource block mapping on two sub-frequency bands of DwPTS, each sub-band comprises 12 subcarriers, and each sub-band the frequency location with a Physical Resource Block is identical respectively.

Be the schematic diagram of the inventive method as shown in Figure 6.The method of mapping distributing virtual Resource Block is the sub-band that changes mapping from the 7th OFDM sign-on.Specifically, on preceding 7 OFDM symbols, take data running time-frequency resource on first sub-band, and take the data running time-frequency resource on second sub-frequency bands on back 2 OFDM symbols.As shown in Figure 6, example one is the mapping schematic diagram when n equals 1, and the OFDM symbol numbers that is used for transfer of data in first sub-band is that the OFDM symbol numbers that is used for transfer of data in 6, the second sub-frequency bands is 2; Example two is the mapping schematic diagrames when n equals 2, and the OFDM symbol numbers that is used for transfer of data in first sub-band is that the OFDM symbol numbers that is used for transfer of data in 5, the second sub-frequency bands is 2.

Embodiment two

An example of the method for mapping distributing virtual Resource Block of the present invention is described in the present embodiment.DwPTS with TDD is an example, and the value that is used for the OFDM symbol numbers n of transmitting control channel is 1 or 2.Here suppose that DwPTS comprises N=9 OFDM symbol, then the index of each OFDM symbol is followed successively by 0,1,2 ..., 8.Method of the present invention be a distributing virtual resource block mapping on two sub-frequency bands of DwPTS, each sub-band comprises 12 subcarriers, and each sub-band the frequency location with a Physical Resource Block is identical respectively.

Be the schematic diagram of the inventive method as shown in Figure 7.The method of mapping distributing virtual Resource Block is from the

Individual OFDM sign-on changes the sub-band of mapping.Specifically, on preceding 5 OFDM symbols, take data running time-frequency resource on first sub-band, and take the data running time-frequency resource on second sub-frequency bands on back 4 OFDM symbols.As shown in Figure 7, example one is the mapping schematic diagram when n equals 1, and the number that is used for the OFDM symbol of transfer of data in two sub-frequency bands equates; Example two is the mapping schematic diagrames when n equals 2, and the OFDM symbol numbers that is used for transfer of data in first sub-band is lacked one than the OFDM symbol numbers that is used for transfer of data in second sub-frequency bands.

Embodiment three

An example of the method for mapping distributing virtual Resource Block of the present invention is described in the present embodiment.DwPTS with TDD is an example, supposes that here DwPTS comprises N=9 OFDM symbol, and then the index of each OFDM symbol is followed successively by 0,1,2 ..., 8.Here be example with general CP frame structure, promptly a time slot comprises 7 OFDM symbols.Method of the present invention be a distributing virtual resource block mapping on two sub-frequency bands of DwPTS, the width of each sub-band is 12 subcarriers, and each sub-band the frequency location with a Physical Resource Block is identical respectively.Here considered the influence of user's specific reference signals, according to the result of present LTE, to the general subframe structure of general CP, user's specific reference signals is to be positioned at the 3rd, 6,9 and 12 OFDM symbol.According to the structure of this user's specific reference signals, when DwPTS only comprises 9 OFDM symbols, have only in the 3rd and 6 two the OFDM symbol to comprise user's specific reference signals.Here suppose that control channel takies first OFDM symbol.

Shown in the example one of Fig. 8, suppose that the method for mapping distributing virtual Resource Block is the OFDM number of symbols that does not rely on DwPTS, the fixing sub-band that changes mapping from the 7th OFDM sign-on.Specifically, on preceding 7 OFDM symbols, take data running time-frequency resource on first sub-band, and take the data running time-frequency resource on second sub-frequency bands on back 2 OFDM symbols.Obviously, adopt this method, do not have user's specific reference signals in two OFDM symbols on second sub-frequency bands.That is to say, DwPTS is comprised the situation of 9 OFDM symbols, adopt the method for example one, when system configuration user specific reference signals, can not support the distributed data channel.When example one has illustrated the configure user specific reference signals, the problem that the distributed data channel may exist.

Shown in the example two of Fig. 8, suppose that the method for mapping distributing virtual Resource Block is the OFDM number of symbols that does not rely on DwPTS, the fixing sub-band that changes mapping from the 6th OFDM sign-on.Specifically, on preceding 6 OFDM symbols, take data running time-frequency resource on first sub-band, and take the data running time-frequency resource on second sub-frequency bands on back 3 OFDM symbols.Adopt this method,, thereby guaranteed to have user's specific reference signals in three OFDM symbols on second sub-frequency bands because user's specific reference signals can transmit on the 6th OFDM symbol.Thereby DwPTS is comprised the situation of 9 OFDM symbols, adopt the method for example two, when system configuration user specific reference signals, can support the distributed data channel.Here changing the sub-band that shines upon from the 6th OFDM sign-on is the demand that comprehensively can consider various DwPTS symbol lengths, and specifically, when DwPTS comprised 9 OFDM symbols, the sub-band that changes mapping from the 5th OFDM sign-on was optimum; When DwPTS comprised 10 or 11 OFDM symbols, the sub-band that changes mapping from the 6th OFDM sign-on was optimum; When DwPTS comprised 12 OFDM symbols, the sub-band that changes mapping from the 7th OFDM sign-on was optimum; So take all factors into consideration various demands, can change the sub-band of mapping from the 6th OFDM sign-on.

With LTE TDD is example, and to lengthening CP frame structure, an example of the method for mapping distributing virtual Resource Block is the OFDM number of symbols that does not rely on DwPTS, the fixing sub-band that changes mapping from the 5th OFDM sign-on.Specifically, on preceding 5 OFDM symbols, take data running time-frequency resource on first sub-band, and take the data running time-frequency resource on second sub-frequency bands on other OFDM symbols.Here changing the sub-band that shines upon from the 5th OFDM sign-on is the demand that comprehensively can consider various DwPTS symbol lengths, and specifically, when DwPTS comprised 8 and 9 OFDM symbols, the sub-band that changes mapping from the 5th OFDM sign-on was optimum; When DwPTS comprised 10 OFDM symbols, the sub-band that changes mapping from the 6th OFDM sign-on was optimum; So take all factors into consideration various demands, can change the sub-band of mapping from the 5th OFDM sign-on.

The number of remembering the OFDM symbol that comprises in the time slot is

To general CP structure, Equal 7; To lengthening CP structure,

Equal 6.In the present embodiment, to general CP structure, the position of frequency hopping transfer point is the 6th an OFDM symbol; To lengthening CP structure, the position of frequency hopping transfer point is the 5th an OFDM symbol; So to these two kinds different CP structures, the method for present embodiment may be summarized to be: on two sub-frequency bands in distributing virtual resource block mapping to a TTI, and from

-1 OFDM sign-on changes the sub-band of mapping.

Claims (28)

1. a method of shining upon distributed channel comprises the steps:

A) number n of the OFDM symbol that takies of base station indication control channel;

B) according to n, N OFDM symbol among the TTI determined with the number of the OFDM of first sub-band transmission with the number of the OFDM of second sub-band transmission wherein, N is the number of the OFDM symbol that comprises in the TTI, n is the preceding several OFDM symbols in the TTI.

2. method according to claim 1 is characterized in that utilizing the mean value n of all values of n, determines with the number of the OFDM of first sub-band transmission with the number of the OFDM of second sub-band transmission.

3. method according to claim 2 is characterized in that in N-n the OFDM symbol of back in a TTI, with the OFDM symbolic number of first sub-band transmission than Duo 1 or equal or 1 less with the OFDM symbolic number of second sub-band transmission.

4. method according to claim 3 is characterized in that from N _HopIndividual OFDM sign-on changes the sub-band of mapping, here

Perhaps be expressed as

5. method according to claim 4 is characterized in that when n is 2 or 1.5,

Perhaps be expressed as

6. method according to claim 1: it is characterized in that in N-n the OFDM symbol of back in a TTI that the OFDM symbolic number of first sub-band transmission Duo 1 or equal or 1 less than the OFDM symbolic number of second sub-band transmission.

7. method according to claim 6: it is characterized in that from N _HopIndividual OFDM sign-on changes the sub-band of mapping, here

Perhaps be expressed as

8. the method for reseptance of an ofdm system, total total N OFDM symbol in a TTI, comprise at least be used for transmitting control channel n OFDM symbol and be used for M OFDM symbol of transmitting user data, it is characterized in that:

Obtain being used for the number n of OFDM symbol of transmitting control channel;

Receive n OFDM symbol of transmitting control channel and the certain customers' data among the TTI with first sub-band;

Receive remaining users data among the described TTI with second sub-band, wherein with second sub-band receive the OFDM symbolic number with the difference of n variable or utilize at least n might value mean value n fix, wherein, N is the number of the OFDM symbol that comprises in the TTI, and n is the preceding several OFDM symbols in the TTI.

9. method according to claim 8 is characterized in that in N-n the OFDM symbol of back in a TTI, and the symbolic number that receives OFDM with first sub-band is Duoed 1 or equal or 1 less than the symbolic number that receives OFDM with second sub-band.

10. method according to claim 8 is characterized in that from N _HopIndividual OFDM sign-on uses the second sub-band receiving subscriber data, here

Perhaps be expressed as

11. method according to claim 10 is characterized in that when n is 2 or 1.5,

Perhaps be expressed as

12. method according to claim 8: it is characterized in that in N-n the OFDM symbol of back in a TTI that the symbolic number that receives OFDM with first sub-band is Duoed 1 or equal or 1 less than the symbolic number that receives OFDM with second sub-band.

13. method according to claim 12: it is characterized in that from N _HopIndividual OFDM sign-on uses the second sub-band receiving subscriber data, here

Perhaps be expressed as

14. the sending method of an ofdm system, total total N OFDM symbol in a TTI comprises being used for n OFDM symbol of transmitting control channel at least, is used for M OFDM symbol of transmitting user data, it is characterized in that:

Transmission is used for the number n of OFDM symbol of transmitting control channel;

Send the OFDM symbol with first sub-band;

Send the OFDM symbol with second sub-band afterwards, wherein with second sub-band send the OFDM symbolic number with the difference of n variable or utilize at least n might value mean value n fix, wherein, N is the number of the OFDM symbol that comprises in the TTI, and n is the preceding several OFDM symbols in the TTI.

15. method according to claim 14 is characterized in that in N-n the OFDM symbol of back in a TTI, the symbolic number that receives OFDM with first sub-band is Duoed 1 or equal or 1 less than the symbolic number that receives OFDM with second sub-band.

16. method according to claim 15 is characterized in that from N _HopIndividual OFDM sign-on uses second sub-band to send user data, here

Perhaps be expressed as

17. method according to claim 16 is characterized in that when n is 2 or 1.5,

Perhaps be expressed as

18. method according to claim 14: it is characterized in that in N-n the OFDM symbol of back in a TTI that the symbolic number that receives OFDM with first sub-band is Duoed 1 or equal or 1 less than the symbolic number that receives OFDM with second sub-band.

19. method according to claim 18: it is characterized in that from N _HopIndividual OFDM sign-on uses the second sub-band receiving subscriber data, here

Perhaps be expressed as

20. the method for reseptance of an ofdm system, total total N OFDM symbol in a TTI, at least comprise and be used for n OFDM symbol of transmitting control channel, be used for M OFDM symbol of transmitting user data, it is characterized in that: in a TTI in N-2 the OFDM symbol of back, the symbolic number that receives OFDM with first sub-band is Duoed 1 or equal or 1 less than the symbolic number that receives OFDM with second sub-band, wherein, N is the number of the OFDM symbol that comprises in the TTI, and n is the preceding several OFDM symbols in the TTI.

21. method according to claim 20 is characterized in that from N _HopIndividual OFDM sign-on uses second sub-band to send user data, here

Perhaps be expressed as

22. the method for a mapping distributed channel in DwPTS comprises step:

A) base station sends PCFICH on first OFDM symbol of DwPTS, the number n of the OFDM symbol that the indication control channel takies;

B) base station sends descending control signaling in preceding n the OFDM symbol of DwPTS;

C) send downlink data on the distributed channel of base station in DwPTS, here, distributed channel is mapped on two sub-frequency bands of DwPTS, and the sub-band that takies in first time slot back conversion of DwPTS.

23. the method for a mapping distributed channel in DwPTS comprises the steps:

A) the number N of the OFDM symbol in the indication DwPTS and the number n of the OFDM symbol that control channel takies;

B) a transmission described N symbol in DwPTS wherein, removes n outer symbol of described transmitting control channel, transmits M-n OFDM symbol and remains N-M symbol with the second sub-band transmission OFDM symbol with first sub-band, and wherein M is fixing value.

24. method according to claim 23 is characterized in that M gets

,

It is the number of the OFDM symbol that comprises of a time slot.

25. according to claim 23 or 24 described methods, it is characterized in that, all have user's specific reference signals in two hop region of distributed data channel.

26. the method for reseptance of an ofdm system is characterized in that:

Obtain the number N of the OFDM symbol among the DwPTS and OFDM symbol numbers n that control channel takies;

User data with in M-n the OFDM symbol among first sub-band reception DwPTS carries out channel estimating with user's specific reference signals wherein;

Receive user data in N-M the OFDM symbol among the described DwPTS with second sub-band, carry out channel estimating with user's specific reference signals wherein, wherein M is fixing value.

27. the equipment of distributed channel is handled in a base station, comprises emitter, also comprises:

A) distributed channel mapping controller is used to control the position that distributed channel is mapped to the sub-band of two sub-frequency bands and transformed mappings;

B) physical channel multiplexer is used to accept the control of distributed channel mapping controller, realizes the mapping to distributed channel.

28. a subscriber equipment is handled the equipment of distributed channel, comprises receiving system, also comprises:

A) distributed channel is separated the mapping controller, is used to be controlled at receive the position that data-signal and conversion receive the sub-band of data on two sub-frequency bands of distributed channel mapping;

B) physical channel demodulation multiplexer is used to accept the control that distributed channel is separated the mapping controller, realizes the mapping of separating to distributed channel.

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