CN100539462C - Be used for supporting the method for the multiple-input and multiple-output transmission that OFDM is used - Google Patents

Abstract

Some aspects of the present invention provide MAC to strengthen so that support the PHY feature of MIMO-OFDMA framework.MAC strengthens and to comprise DL burst allocation, the UL burst allocation of supporting the adaptive MIMO transmission of supporting the adaptive MIMO transmission, support MIMO model selection (for example Space Time Transmit Diversity (STTD) or spatial reuse (SM)) and/or displacement patterns to select the fast feedback channel operation and the dynamically CQICH allocation and deallocation and the use that is used for the CQICH_ID of DL burst allocation of the wireless terminal dynamical feedback of (for example diversity or adjacent sub-carriers pattern).One or more of these enhancings are included in the given realization.Also provide method to be used to realize that MAC strengthens.

Description

Be used for supporting the method for the multiple-input and multiple-output transmission that OFDM is used

Related application

The application requires the rights and interests of U.S. Provisional Patent Application No.60/564227 that submits in the U.S. Provisional Patent Application No.60/559016 that submitted on April 5th, 2004, on April 22nd, 2004 and the U.S. Provisional Patent Application No.60/564228 that submitted on April 22nd, 2004.

Technical field

The present invention relates to the wireless transmission of information, specifically, relate to and be used for the method for transfer of data that control meets the interests of multiple-input and multiple-output (MIMO) and OFDM (OFDM).

Background technology

OFDM (OFDM) is the multiplexing of a kind of form, distributing data on a plurality of carrier waves at its extremely accurate interval in having frequency domain.The accurate interval of carrier wave provides some benefits, for example spectral efficient, to the elasticity of radio frequency interference and lower multipath distortion.Because its favourable attribute and premium properties in the multipath fading wireless channel, OFDM has been confirmed as the useful technology in high data rate wireless communication, for example wireless MAN (MAN) field.Wireless MAN is for network fixing, portable and that the mobile broadband connecting system is realized by air interface.OFDM (OFDMA) is the multiple access technology that utilizes the OFDM technology.

The MIMO antenna system also is considered and is attached among the wireless MAN.Mimo system adopts a plurality of emissions and a plurality of reception antenna to come transmission information.The MIMO antenna system allows space diversity.The space diversity utilization transmits data from having known physical multiple source at interval.

OFDM and MIMO technology are combined as wireless broadband communication powerful technology is provided, have the advantage of space diversity and channeling.These attributes are particularly useful in by non line of sight (NLOS) the transmission situation that wireless MAN comprised.

The responsibility of the MAC layer of network can comprise a plurality of terminals that form in Medium Access Control (MAC) Protocol Data Unit (PDU) and the dispatch network.Signaling in the MAC layer is used for notifying terminal to seek the time and/or the position of information in by the signal that air interface transmitted.

Current existence is used to handle the method for the concrete aspect of wireless MAN, for example ofdma communication.But these methods are not handled the method than new ideas in conjunction with MIMO.

Summary of the invention

Some aspects of the present invention provide MAC to strengthen to support the PHY feature of MIMO-OFDMA framework.MAC strengthens DL burst allocation, the UL burst allocation of supporting the adaptive MIMO transmission that comprises the transmission of support adaptive MIMO, the use that fast feedback channel is operated and dynamically CQICH distributes and be used for the CQICH_ID of DL burst allocation of supporting the SS dynamical feedback of MIMO pattern (for example STTD or SM model selection) and displacement patterns (for example diversity or adjacent sub-carriers model selection).One or more of these enhancings are included in the given realization.

According to a first aspect of the invention, provide a kind of being used for to enable the method that ofdm system is realized from the base station downlink transmission of at least one wireless terminal at MIMO, this method comprises: the sum in the zone that comprises information is transmitted at least one wireless terminal in the base station, and the information in the zone is transmitted subsequently; For each zone in total several zones, transmit at least one wireless terminal the base station; Position according to the zone in the Frame of two-dimensional representation; Be used for transmitting the diversity multiplexed format of the information in the zone that is positioned at frame; As the position in the third dimension in the zone of one of total several layers; For each layer of total several layers, transmission transmission profile and being used to identifies the identifier that is connected between base station and at least one wireless terminal.

According to a second aspect of the invention, provide a kind of being used for to enable the method that ofdm system is realized the ul transmissions from least one wireless terminal to the base station at MIMO, this method comprises: the sum of the range of distribution that comprises the information that will be transmitted by at least one wireless terminal is transmitted at least one wireless terminal in the base station, and described zone is transmitted subsequently; For each range of distribution, transmit transmission profile and be used to identify the identifier that is connected between base station and at least one wireless terminal; And transmit to be used for sending and be positioned at the diversity multiplexed format of the information of range of distribution.

According to a third aspect of the invention we, a kind of method that is used for enabling at MIMO the ofdm communication system assigned transmission parameters is provided, and this method comprises that the base station transmits at least one wireless terminal: the subcarrier that will use during the message transmission in Frame is to the logical mappings of subchannel; The type of the transmit diversity that in Frame, will use during the message transmission; And the diversity multiplexed format that is used for transmit data frames information.

According to a forth aspect of the invention, a kind of method that is used for distributing at Frame the feedback channel between base station and the wireless terminal is provided, wherein poll is carried out to wireless terminal in the base station, and this method comprises that the base station transmits to wireless terminal: the position of the feedback channel in the frame; And the type of the base station feedback information of just asking.

According to a fifth aspect of the invention, a kind of method of wireless terminal to base station reporting MIMO pattern and/or displacement patterns setting that allow is provided, wherein mode initialization is arranged in the fast feedback channel that transmits to base station uplink from wireless terminal, and this method comprises with the form transfer mode of encoding scheme indication to be set.

According to a sixth aspect of the invention, a kind of method at least one wireless terminal dynamic assignment channel quality indicating channel in the MIMO-OFDM system that is used for is provided, this method comprises that the base station transmits at least one wireless terminal: the sign of the channel in the Frame, and at least one wireless terminal can transmit feedback information to the base station therein; The position of the channel in the frame; Be used to transmit with base station and at least one wireless terminal between the MIMO feedback cycle of the relevant feedback information of transmission channel.

According to a seventh aspect of the invention, enable to provide in the ofdm communication system each the transmitter of method that is fit to carry out in the above claim at MIMO.

By reading below in conjunction with the explanation of accompanying drawing to specific embodiment of the present invention, those skilled in the art will others of the present invention fully aware of and feature.

Description of drawings

Now with reference to accompanying drawing the preferred embodiments of the present invention are described, in the accompanying drawing:

Figure 1A is a schematic diagram of supporting 4 antennamitters of MIMO-OFDM communication;

Figure 1B is a schematic diagram of supporting 4 antennamitters of MIMO-OFDM communication;

Fig. 1 C is a schematic diagram of supporting 4 antennamitters of MIMO-OFDM communication;

Fig. 1 D is a schematic diagram of supporting 4 antennamitters of MIMO-OFDM communication;

Fig. 1 E is a schematic diagram of supporting 4 antennamitters of MIMO-OFDM communication;

Fig. 2 is the schematic diagram for the OFDMA frame of embodiment use provided by the present invention;

Fig. 3 is a flow chart of realizing the transmission of the downlink information from the base station to the wireless terminal according to one embodiment of present invention;

Fig. 4 is a flow chart of realizing the transmission of the downlink information from the base station to the wireless terminal according to another embodiment of the invention;

Fig. 5 is a flow chart of realizing the transmission of the up-link information from the base station to the wireless terminal according to one embodiment of present invention;

Fig. 6 distributes the base station to arrive the flow chart of the feedback channel of wireless terminal according to one embodiment of present invention; And

Fig. 7 distributes the base station to arrive the flow chart of the feedback channel of wireless terminal according to another embodiment of the invention.

Embodiment

According to embodiments of the invention, provide MAC to strengthen so that support the PHY feature of OFDMA framework.In identical frames, the user with SISO, MISO, MIMO ability also can be supported.

As general introduction, it may be the different OFDM resources of the subchannel of AMC subchannel and/or diversity subchannel etc. for example that each user who uses the OFDM framework to be used to the information that transmits can be mapped to.For MIMO user, preferably, support a plurality of different space time encoding schemes, such as SM (spatial reuse) and STTD (Space Time Transmit Diversity).

On continuous foundation, there be the OFDM symbols streams related with each transmitting antenna.Each user may at first be mapped to one or more OFDM symbols, and each OFDM symbol may be mapped to its related antenna then.In certain embodiments, this mapping also allows to carry out the rate controlled (PARC) by antenna.

Each OFDM symbol can be mapped to its related antenna in the subcarrier territory.For some subcarrier, if do not shine upon specific user's data, then may be by the corresponding antenna of feed-in to the zero allocation of this subcarrier.

Particular moment in time since the utmost point simplified example that the mapping of specific OFDM symbol and antenna may transmit shown in Figure 1A.Figure 1A illustrates four antenna transmission systems, and it is used to transmit six user grouping 60,62,64,66,68,70 in described example, and wherein each is through FEC (forward error correction) and modulation.Six users' of particular moment the concrete mapping of six groupings is described.As time passes, the mode of number of users and/or mapping user grouping preferably dynamically changes.

For particular moment, in four different frequency bands F1, F2, F3, F4, distribute the OFDM bandwidth.They for example may be considered to the AMC subchannel.Similarly method can be used for the diversity subchannel.

Each grouping will adopt selected mapping scheme to be mapped to four antennas.In certain embodiments, multiple different scheme is available, perhaps gives the transmitting antenna and the reception antenna of determined number.For example, for 2 * 2 systems, preferably can select STTD or SM (BLAST-Bell Laboratory sheaf space time).In other embodiments, only realize single alternative for each antenna alignment.The single antenna user adopts the single output of single input transmission plan (SISO) (it may comprise the rate controlled of PARC-by antenna).

On frequency band F3, adopt unique antenna 1 to transmit first grouping 60, this expression 1 * 1SISO transmission.

Second grouping 62 transmits on two antennas 1 and 2 in frequency band F4, this expression 2 * 1,2 * 2 or 2 * 4MIMO transmission.

The 3rd grouping 64 only transmits on antenna 2 in frequency band F3, and this represents 1 * 1SISO transmission equally.

The 4th grouping 66 transmits on frequency band F2 by antenna 3.

The 5th grouping 68 transmits on frequency band F1 by two antennas 3 and 4.

At last, grouping 70 transmits on unique frequency band F2 of antenna 4.

In general, each grouping can be mapped to respectively on part or all antenna.This makes MIMO and the non-MIMO user can be mixed.In above example, grouping 60,64,66 and 70 is used for non-MIMO user.Grouping 62 and 68 is used for MIMO user.

The flexible mapping that note that MIMO and non-MIMO user is applicable to the context of " part is utilized " and " complete utilization ".Utilize only the have the right part of travel all over OFDM frequency band of given base station by part.Institute's definitional part that will belong in this case, whole frequency band for the defined sub-band F1 of the example of Figure 1A, F2, F3, F4.Utilize by part, can distribute different frequency bands different base station approaching on the geography.By complete utilization, whole OFDM frequency band is used in each base station.By a kind of like this realization, for the instantiation of Figure 1A, sub-band F1, F2, F3, F4 will be mapped to whole frequency band.

For SISO user, with the single band of using on the single antenna.For MIMO user, allocation list is shown N _T* N _R

In Figure 1A, can be used for STTD and BLAST as the flexible structure shown in the realization.For example, grouping 62 can adopt the frequency band F4 on the antenna 1 and 2 that utilizes BLAST or STTD to transmit.

Instantiation shown in Figure 1A is designed to show that the coexistence of SISO and MIMO is STTD and/or BLAST.The quantity of the sub-band in the OFDM frequency band and shape thereof, size, position etc. are realized specific details beyond doubt.Mapping can be carried out on every OFDM symbolic base or for a plurality of OFDM symbols.

At applicant's common pending application number＜attorney docket 71493-1330, title for _ _ _ _ in defined and carried out from the details of the method for a plurality of antenna transmission, by reference it intactly is incorporated into this.This method generally comprises:

The available OFDM bandwidth of each antenna is divided into subchannel;

Define a plurality of zones, each zone is defined by the OFDM symbol of the corresponding set of sub-channels and the quantity that defines;

A plurality of antennas one or more that define the mapping of each regional respective antenna and select to be used for this zone, the antenna mapping comprises at least one MIMO mapping;

Adopt the respective antenna mapping at least one user's content map in the zone each;

Be to transmit each zone on the selected one or more antennas in zone.

The title of submitting on April 4th, 2005 is the common pending application of applicant of " being used for space-time transmit diversity systems and method that OFDM uses " number＜attorney docket 71493-1327〉further defined the details of carrying out the method for content map, by reference it intactly is incorporated into this.

The another kind of mode of considering this situation is, defined each temporal frequency piece can have its oneself matrix.In case specified matrix, then defined the antenna amount of output place.For example, 2 * 2 matrixes need two antennas; 4 * 4 matrixes need four antennas.The uncertain quantity of definite different user that can shine upon uniquely of matrix.

A plurality of users' content need be shone upon with consistent and conflict free mode undoubtedly.In addition, need notify each user about its content with the position/time that is transmitted.

For each individual consumer, the antenna mapping realizes STTD, SM and PARC transmission for AMC subchannel or diversity subchannel.In one embodiment, any of six different mappings configurations can be applicable to each individual consumer, comprising three 4 transmitting antenna mappings, the mapping of 2 transmitting antennas and single antenna mappings.

Up link can comprise for example two kinds of patterns: (1) has the STTD of two transmitting antenna ability SS, and (2) have the virtual MIMO of single transmit antenna capabilities SS.

Referring now to Figure 1B, 1C, 1D and 1E, shown is concrete transmitter configuration.In a preferred embodiment, transmitter is dynamically reconfigurable, so that realize the transmission that employing respective transmissions form carries out to a plurality of users.The instantiation of following Figure 1B, 1C, 1D and 1E can be considered to " snapshot " of this reconfigurable transmitter.These configurations also can exist simultaneously for the different sub-bands of the whole OFDM frequency band that is adopted.For example, the configuration of Figure 1B can be used for first set of sub-channels or an OFDM frequency band and an associated user; The configuration of Fig. 1 C can be used for second set of sub-channels or the 2nd OFDM frequency band and associated user, or the like.Certainly, to need not be repetition to the many assemblies that are expressed as repetition physically.For example, single IFFT and related radiating circuit can use by antenna, wherein carry out different mappings, and then are input to the suitable subcarrier of IFFT.

Figure 1B illustrates an example arrangement, wherein has according to single inlet flow to carry out the matrix of STTD coding and have the level code that is used for two, three or four transmitting antennas.Inlet flow 1000 carries out the STC coding then through coding and modulation in space time encoder 1002, wherein have two, three or four outputs, and they then are fed to corresponding emission chain and are transmitted.Corresponding receiver structure generally is expressed as 1004.In this case, according to the receiver ability, with undefined matrix F _{4 x 1}Or F _{4 x 2}Can be used for four transmitting antennas, perhaps with undefined F _{2 x 1}Can be used for two transmitting antennas.These all are for example adoptable STTD matrixes; Other matrix is feasible.

Fig. 1 C illustrates an example arrangement, wherein has for a plurality of inlet flows to carry out the matrix of STTD coding and have level code for two, three or four transmitting antennas.Inlet flow 1006,1008 (only illustrates two, more a plurality of inlet flows are feasible) through coding and modulation, carry out the STC coding then in space time encoder 1010, encoder has two, three or four outputs, and they then are fed to corresponding emission chain and are transmitted.In this case, according to the receiver ability, with undefined matrix F _{4 x 1}Or F _{4 x 2}Can be used for four transmitting antennas, perhaps with undefined F _{2 x 1}Can be used for two transmitting antennas.These all are for example adoptable STTD matrixes; Other matrix is feasible.

Fig. 1 D illustrates an example arrangement, wherein has SM (for example BLAST) coding of matrix carry out to(for) single inlet flow.Inlet flow 1012 is through coding and modulation, and demultiplexing is two, three or four streams 1012,1014 then, and they are fed to corresponding emission chain and are sent out.In this case, matrix F _{4 x 4}May be used for four transmitting antennas, perhaps F _{2 x, 2,2 x 4}Can be used for two transmitting antennas, they are defined following, and they both are for example adoptable SM matrixes; Other matrix is feasible.The example that this is so-called " vertical coding ", therein, the incoming symbol of given inlet flow is vertical distribution (being to go up simultaneously the time) between a plurality of antennas.

Fig. 1 E illustrates an example arrangement, wherein has SM (for example BLAST) coding of matrix carry out to(for) a plurality of inlet flows.Inlet flow 1020,1022 (only illustrate two, more inlet flow is feasible) process coding and modulation, and be fed to corresponding emission chain and transmission.In this case, matrix F _{4 x 4}May be used for four transmitting antennas, perhaps F _{2 x, 2,2 x 4}Can be used for two transmitting antennas, they are defined following, and they both are for example adoptable SM matrixes; Other matrix is feasible.This be so-called example of " level code ", therein, the incoming symbol horizontal distribution of given inlet flow (promptly in time in order) is on single antenna.

The MAC layer is used for realizing feature in physics (PHY) layer at OFDMA air interface framework.Frame is a kind of form that is used for transmitting by the air interface between base station (BS) and the wireless terminal data, and in some cases, wireless terminal is subscriber board (SS).Subscriber board for example is any known wireless device, for example cell phone, the computer with radio modem or PDA.Though subscriber board represents to subscribe the device of certain service, be appreciated that more generally wireless terminal may not be the subscriber of any service.Map information element (IE) is included in the frame, so that be provided for defining the structure of down link and up-link information present position in frame in frame.

The schematic diagram of the exemplary frames that Fig. 2 explanation is used in combination with embodiments of the invention.Frame has the two-dimensional appearance of representing with row and column.Row by logical sub-channel numbering L, L+1 ... L+15 represents, row by OFDMA symbol number M, M+1 ... M+15 represents.Grouping to logical sub-channel specified activities subcarrier.Active subcarriers is the data subcarriers that is used for transfer of data, be used for synchronous pilot subcarrier or do not relate to direct transmission but as wherein any of subcarrier of the over current protection between the part of frame.In the frame N of Fig. 2, preamble 10 is included in the OFDMA symbol M.The 2nd OFDMA symbol M+1st comprises down link (DL) map component 12 that comprises one or more information elements 13 and up link (UL) map component 14 that comprises one or more information elements 15.Also can comprise other broadcast (not shown).Follow-up OFDMA symbol comprises DL subframe 17.DL subframe 17 comprises the DL information in the zone 16 of distributing to the DL subframe 17 that will be sent to one or more subscriber boards.It after DL subframe 17 transmission/reception/over current protection (TTG) 18.It after TTG18 the UL subframe 19 that comprises the UL information of the appointed area 24 of distributing to the UL subframe that will pass back to base station (BS).UL subframe 19 comprises also and is used to allow the fast feedback channel 22 of SS to the BS report information that for example, fast feedback channel 22 can be appointed as the channel of the air interlace channel quality that shows between BS and the SS.It after UL subframe 19 reception/transmission over current protection (RTG) 20.Frame N-1 and N+1 have similar formation.

The existing IE that is used for the OFDMA wireless transmission is unfavorable for the operation of MIMO-OFDMA system.In traditional OFDMA wireless transmission, the zone 16 in the frame is only numbered by two dimension attributes, time and frequency or logical sub-channel and the OFDMA symbol number is represented.Then there is not space diversity in a plurality of antennas that do not use MIMO and provided.The interpolation of space diversity allows dissimilar space time coding (STC) technology, and this realizes the multilayer two-dimension data again.Layer is different encoding stream.Therefore, MIMO allows the three dimensional representation of the information that will send.Divide and to be equipped with the zone 16 that comprises information and to represent that with the time shown in the two-dimensional representation of Fig. 2 and frequency or logical sub-channel numbering and OFDMA symbol number still, each zone 16 can have a plurality of layers, the additional bandwidth that transmits between increase BS and the one or more SS.The suitable sign of the position of the information that will transmit in one or more layers of each zone importantly is provided.The sign of the position of information is included among the DL mapping IE.

Support the DL burst allocation of adaptive MIMO transmission

In some embodiments of the invention, the IE13 of DL map component 12 is DL mapping IE.DL mapping IE at first defines and will be included in a plurality of regional 16 in the mapping.Then, for each zone 16, the position of mapping IE definition information.For example, come original position in the defined range 16 according to the coordinate that comprises first dimension coordinate and second dimension coordinate, for example OFDMA symbol offset and subchannel offset.Deviant provides the relative position apart from known original position.In certain embodiments, zone 16 also defines by zone 16 a plurality of OFDMA symbols and a plurality of subchannels that take.In conjunction with these two positional informations the ability of the size of understanding zone 16 is provided.

For each zone 16, be the definition of the transmission of Information in the zone 16 diversity multiplexed format.Also for each zone definitions third dimension, therein, the information that transmit is accessed as one of multilayer.

In some embodiment of DL map component 12, for the adaptive MIMO pattern of the ability of supporting to have dissimilar diversity multiplexing or space time coding (STC), for example Space Time Transmit Diversity (STTD) and spatial reuse (SM), provide information word usually to show to take place between STTD and the SM time that exchanges.Such IE may be favourable for the similar MIMO pattern of the All Ranges in the given frame of sign.In certain embodiments, if indicate in " MIMO DL is basic " IE, the instruction that then exchanges IE can be left in the basket according to each distribution, will be described below.Table 1 defines transmit diversity (TD)/regional exchange message element, for example is designated the syntactic structure of the embodiment of " TD zone " IE.

In certain embodiments, in the DL map component 12, MIMO enables BS and transmits and to equal the predefine value, for example equal 15 downlink interval and use code (DIUC) and " TD zone " IE, adopts particular permutation and/or transmit diversity coding to show subsequent allocations.DIUC is used for the transmission characteristic of definition signal, for example defines the code value of the characteristic such as code check and/or modulation type.Above-described predefine value is pre-defined to show the MIMO enabled systems.

In certain embodiments, the DL frame has that default displacement patterns is set and default diversity mode is set, for example sub-channelizing (PUSC) displacement patterns of part use and do not have transmit diversity.This adopts the displacement and/or the diversity mode of IE indication according to the distribution of IE.

Table 1-transmit diversity (TD)/zone exchange IE

Grammer	Size	Note
			TD Zone IE(){
Extended DIUC	4	TD/ zone=0x01
			Length
	4	Length=0x02
			Permutation
	2	The optional FUSC displacement of 00=FUSC displacement 01=FUSC displacement 10=11=keeps
			Use All SC Indicator	1	0=does not use all subchannel 1=to use all subchannels
Transmit Diversity	2	00=does not have emission diversity 01=STC and adopts 2 antenna 10=STC to adopt 4 antenna 11=FHDC
			Matrix Indicator
	3	The STC matrix

		000=matrix A 001=matrix B 010=Matrix C 011=matrix D 100=matrix E 101-111=keeps
			IDcell	6
Reserved	2
			}

Expansion DIUC is another grouping of code value." expansion DIUC " field is used for related code value to identify the particular type of IE.For example, " TD zone " IE in the table 1 has " expansion DIUC "=01.Other IE of the following stated is expressed as has different each expansion DIUC values.The value that provides in table 1 or the following follow-up table is the example of spendable code value, and is appreciated that the code value that is distributed and is used for representing that the quantity of the position of code value may change according to the expection operating position.

In above grammer, " Permutation " field shows by the BS transmitter for according to the employed concrete displacement of the distribution of IE.Just allow displacement to change in the zone boundary." Idcell " that IE represents is as the basis of displacement.

Displacement is the concrete mapping that subcarrier arrives logical sub-channel.The three kinds of known dissimilar displacements usually of table 1 sign are such as PUSC, use sub-channelizing (FUSC) and optional FUSC fully.PUSC is by being distributed to assigning sub-carriers subchannel but not utilizing subchannel to utilize the displacement of wherein adopting all channel diversity fully.FUSC utilizes the displacement of wherein adopting all channel diversity by assigning sub-carriers is distributed to the subchannel that wherein utilizes all subchannels fully.Optional FUSC adopts the more change of the FUSC of multi sub-carrier, thereby needs slightly different mappings.The use of other displacement patterns also is considered to belong within the scope of the present invention, for example adjacent sub-carriers displacement.

" Use All SC indicator " field is in the transmission that is set to show on all available subchannels in 1 o'clock.When choosing the FUSC displacement in " Permutation " field, transmission is all the time on all subchannels.

" Transmit Diversity " field shows that transmitter is for according to the employed diversity mode of the distribution of IE.The distribution that does not have transmit diversity is only from an antenna transmission.The BS transmitter distributes from two or more antenna transmission for all with transmit diversity.

" Matrix indicator " Field Definition diversity multiplexed format.In certain embodiments, the diversity multiplexed format is by being used to show that the designator of predefine matrix transformat defines.

Value representation in " size " of table 1 row is used to represent the quantity of position of the element of each respective field.Be appreciated that a just example of each respective field of these values.In certain embodiments, Wei quantity may be greater than or less than shown in the table 1.For example, the quantity that may wish the position in any of field so that reduce entire I E size, thereby reduces the overall overhead of frame less than the value shown in above.On the contrary, the quantity of the position in any of field may be greater than the value shown in above, but with the overall overhead that increases frame for can accept cost.

The binary value of " Permutation ", " Transmit Diversity " and " Matrix Indicator " field in " note " of table 1 row with relate to those fields specifically can select option related.Be appreciated that each concrete binary value is an example of each concrete option, concrete option can be represented by any suitable binary value with any suitable figure place.In certain embodiments, be greater than or less than the concrete number of options of determining in the table 1 if exist, then Wei quantity may be greater than or less than shown in the table 1.In addition, be appreciated that the invention is not restricted to the table in determined option.For example, relevant with " Transmit Diversity " field, if there is the option that can use 8 antennas, then will need at least three, and " 100 " can be used for 8 antenna options for this field.Further in the situation of the concrete STC code of 2 or 4 antennas of definition, can determine more multiselect item in hope equally.

In general, the method that is used for enabling the ofdm communication system assigned transmission parameters shown in the flow chart of " TD zone " IE support Fig. 3 at MIMO.This method comprises that the base station transmits at least one wireless terminal: 1) subcarrier that will use during the message transmission in Frame is to the logical mappings (displacement) of subchannel; 2) type of the transmit diversity that in Frame, will use during the message transmission; And 3) be used for the diversity multiplexed format of transmit data frames information.

Table 2 comprises an example of the syntactic structure of the information element that is designated " MIMO DLBasic " IE, it is used for being each the region allocation STC matrix format in the frame of wanting the down link transmission, show the operating position of the third dimension in the zone of a plurality of encoding streams or layer, and distribute the PHY profile according to each layer with the form of DIUC and connection identifier (CID) for the MIMO operation.

In " MIMO DL Basic " IE, MIMO enables BS and transmits the predefine value equal in " MIMO DLBasic " IE structure, for example equals 15 DIUC, to show the MIMO pattern that specific MIMO is enabled the follow-up downlink allocation of SS CID.In certain embodiments, the MIMO pattern of representing among " MIMO DL Basic " IE is only applicable to the end follow-up downlink allocation before of frame.

Table 2-MIMO DL basic I E

Grammer	Size	Note
			MIMO DL Basic IE(){
Extended DIUC	4	0x05
			Length
	8	Length with byte representation
			Num Region
	4
			For(i＝0；i<Num Region；i++){
OFDMA Symbol offset	10
			Subchannel offset	5
Boosting	3
			No.OFDMA Symbols	9
No.subchannels	5
			Matrix indicator	3	STC matrix 000=matrix A 001=matrix B 010=Matrix C 011=matrix D 100=matrix E

		101-111=keeps
			Num layer	2
for(j＝0；j<Num layer；j++){
			If(INC CID＝＝1) {
CID	16
			}
Layer index	2
			DIUC	4	The 0-11 burst profile
}
			}

" Num Region " field shows the quantity by the zones of different 16 of IE definition as shown in Figure 2.For each zone 16, " the OFDMA Symbol offset " of table 2 and the initial point position in the zone in " Subchanneloffset " Field Definition frame.Skew is with respect to known initial position." Boosting " field shows with data subcarriers the signal boost amount of comparing, be applied to pilot subcarrier in respective regions 16 when being transmitted." No.of OFDMASymbols " and " No.Subchannels " Field Definition respective regions are from the scope of the starting point of above sign." Matrix indicator " Field Definition is used for the type of space time coding (STC) matrix format of the information of sending zone.As mentioned above, in certain embodiments, " Transmit Diversity " field among " TD zone " IE is ignored in the concrete selection of the matrix in " Matrix indicator " field of " MIMO DLBasic " IE.

For each zone, the quantity of the MIMO transport layer in " Num Layer " territory, field list area pellucida." INC CID " is designator (1), shows whether CID is included among the IE.If be set to ' 1 ', then comprise the CID field." Layer index " field is specified the concrete layer index of CID.Comprise CID for each layer.This can comprise different CID for each layer, and perhaps a CID can distribute to a plurality of layers.Also to each layer definition DIUC.

" Matrix indicator " Field Definition diversity multiplexed format.In certain embodiments, the diversity multiplexed format is by being used to show that the designator of predefine matrix transformat defines.

Value representation in " size " of table 2 row is used to represent the quantity of position of the element of each respective field.Be appreciated that a just example of each respective field of these values.In certain embodiments, because similar to the above, the quantity of position may be greater than or less than shown in the table 2.

" Matrix Indicator " in " note " of table 2 row and the binary value of " DIUC " field with relate to those fields specifically can select option related.Be appreciated that binary value is the example of each field, concrete option can be represented by any suitable binary value with any suitable figure place.In certain embodiments, be greater than or less than the concrete number of options of determining in the table 2 if exist, then the quantity of the position of each field may be greater than or less than shown in the table 2.Be appreciated that in addition and the invention is not restricted to determined concrete option in the table 2.

In general, " MIMO DL Basic " IE supports being used for shown in the flow chart of Fig. 4 to enable the method that ofdm system is realized from the base station downlink transmission of at least one wireless terminal at MIMO.This method comprises that the base station transmits the sum in the zone that comprises information at least one wireless terminal, and the information in the zone will transmit subsequently.For each zone in total several zones, transmit at least one wireless terminal the base station: 1) according to the position in the zone in the Frame of two-dimensional representation, 2) be used for transmitting the diversity multiplexed format of the information in the zone that is positioned at frame, 3) position in the third dimension in the zone of one of total several layers of conduct, and 4) for each layer of total several layers, transmission transmission profile and being used to identifies the identifier that is connected between base station and at least one wireless terminal.

Support the UL burst allocation of adaptive MIMO transmission

In certain embodiments, the zone 24 of the UL subframe 19 of Fig. 2 that is to say that with " from the beginning to the end " type sequence serial connection one or more SS are used for distributing in a sequential manner to the zone that BS transmits.For example, the first area 24 in the UL subframe 19 in OFDMA symbol M+11, subchannel L+11 begins, and proceeds to OFDMA symbol M+12, subchannel L+8.Second area 24 in the UL subframe 19 is from the end point of first area, and proceeds to OFDMA symbol M+13, subchannel L+4, or the like.The above beginning in each zone and halt are as an example undoubtedly, rather than are intended to limit the invention to zones of these concrete sizes.

Though DL mapping IE need provide three-dimensional mapping to identify the position of the information that will transmit, but the duration of the information that transmits of the starting point of the information that transmits of UL mapping IE definition at least the first transmission and duration and additional areas in certain embodiments.

In certain embodiments, provide UL subframe 19 that mapping IE is used for distribution diagram 2 or with the information of the similar frame of Fig. 2, information sends BS to from SS.UL mapping IE at first defines and will be included in a plurality of regional 24 in the mapping.Then, for each zone 24, be the information definition diversity multiplexed format in the transit area 24.The diversity multiplexed format is selected according to the transmission method of SS, and for example, if SS has the ability of two transmit antennas, then the diversity multiplexed format is for example by selecting the STC form to define.If two or more different single transport antenna SS provide " virtual " MIMO type of functionality, then the diversity multiplexed format is indicated as being and will be used for the expectancy model of the pilot subcarrier pattern of corresponding SS transmission.Also define the duration of each respective regions, so that guarantee that all information in the respective regions 24 are correctly transmitted.

Table 3 comprises an example of the syntactic structure of the MIMO UL map information element that is designated " MIMO UL Basic " IE, it is used for for each the region allocation STC matrix format in the frame of wanting down link to transmit, and distributes PHY profile according to each zone with the form of DIUC and CID for MIMO operates.

In the UL mapping, MIMO enables BS and transmits the predefine value equal among " MIMO UL Basic " IE, for example equals 15 uplink interval and use code (UIUC), so that show specific MIMO is enabled the MIMO pattern that the subsequent uplink of SS CID is distributed.The MIMO pattern of representing among " MIMO DL Basic " IE is only applicable to the end subsequent uplink before of frame and distributes.

Table 3-MIMO UL basic I E

Grammer	Size	Note
			MIMO UL Basic IE(){
Extended UIUC	4	0x02
			Length
	4	Length with byte representation
			Num Assign
For(i＝0；i<Num

Assign；i++){
			CID	16	The basic CID of SS
UIUC
		4
MIMO Control				1	For SS 0:STTD with two transmittabilities; 1:SM is for the SS 0 with cooperation SM ability: pilot frequency mode A; 1: pilot frequency mode B
	Duration	48	In the OFDMA time slot
}
	}

" Num Assign " field shows distribution or the regional quantity among the IE.UL mapping IE has a more than region allocation.For each region allocation, be definition CID of the transmission of Information in that zone and UIUC.Each distributes and also to comprise following any additional indication: a) the MIMO pattern of double antenna transmission SS, perhaps b) for using in conjunction with another single antenna transmissions SS (having different pilot subcarrier patterns) so that realize the sign of pilot subcarrier pattern of single antenna transmissions SS use of the virtual MIMO pattern of two single antenna transmissions SS.

Value representation in " size " of table 3 row is used to represent the quantity of position of the element of each respective field.Be appreciated that the just example of each respective field of these values.In certain embodiments, because to above described similar at table 1 and table 2, the quantity of position may be greater than or less than shown in the table 3.

The binary value of " MIMO Control " field in " note " of table 3 row with relate to that field specifically can select option related.Be appreciated that each concrete binary value is the example of each concrete option, and concrete option can be represented by any suitable binary value with any suitable figure place.In certain embodiments, if there is the number of options that is greater than or less than concrete sign in the table 3, then Wei quantity may be greater than or less than shown in the table 3.For example, " MIMO Control " field may be at least two, and whole four options shown in " note " of associative list 3 row.Be appreciated that in addition and the invention is not restricted to determined option in the table.In certain embodiments, may exist more than and/or be different from the option of described concrete option.

In general, " MIMO UL Basic " IE supports being used for shown in the flow chart of Fig. 5 to enable the method that ofdm system is realized from the base station ul transmissions of at least one wireless terminal at MIMO.This method comprises that the base station transmits the sum of the range of distribution that comprises the information that will be transmitted by wireless terminal at least one wireless terminal, and the zone will be transmitted subsequently.For each range of distribution, the base station is also transmitted to be used for transmitting and is positioned at the diversity multiplexed format of the information of range of distribution.

MIMO pattern/displacement patterns feedback

An alternative embodiment of the invention provides and allows SS show that to BS being used for MIMO enables the MIMO pattern of ul transmissions of OFDMA system and the method for displacement patterns.Reporting at a slow speed and moving the quick report (based on every frame) of using of fixation application is used for determining MIMO pattern and displacement patterns information.As mentioned above, the example of MIMO model selection is SM and STTD, and the example that displacement patterns is selected is diversity mode, adaptive modulation and coding (AMC) pattern and adjacent sub-carriers pattern.

The zone 16 of DL subframe 17 is known as and comprises MAC layer information.The MAC information be known as comprise following partly or entirely: MAC head, MAC subtitle and MAC message payload.

Feed back at a slow speed

Diverse ways can be used to realize being used for reporting the MIMO pattern of the ul transmissions that will be used for BS and/or the wireless terminal or the SS of displacement patterns at a slow speed to BS.In first method, the poll action is initiated by BS.In certain embodiments, this poll action comprises the MAC subtitle that is arranged in MAC PDU, and it is arranged in the zone 16 of DL subframe 17.The MAC subtitle is transmitted by BS, and comprise with UL subframe 19 in the relevant assignment information in position, promptly concrete feedback channel, SS will locates MIMO pattern and/or the displacement patterns setting that BS asks.In UL subframe 19, be one of fast feedback channel 22 shown in Figure 2 from the position that SS carries out feedback report.In certain embodiments, fast feedback channel 22 is channel quality indicating channel (CQICH).

In second method, SS sends the regular reporting of MIMO pattern and/or displacement patterns setting by distributing fast feedback channel 22 to BS.BS is provided with the MIMO feedback cycle, makes SS can adopt fast feedback channel 22 regular reporting MIMO pattern/displacement patterns information.In certain embodiments, fast feedback channel 22 is CQICH.In second method, adopting the UL mapping IE15 that starts by SS in BS is the transmission allocation and deallocation fast feedback channel 22 of MIMO pattern information.

In certain embodiments, in communication system, SS indicates and the mimo channel coefficient to the BS reporting channel quality by the fast feedback channel of being set up between BS and the SS 22.In certain embodiments, fast feedback channel 22 is used for showing to BS the selection of MIMO pattern, i.e. STTD or SM by SS.In certain embodiments, fast feedback channel 22 is used for showing selection between diversity mode and adaptive modulation and coding (AMC) pattern to BS by SS, for example adopts the adjacent sub-carriers displacement patterns.

Quick feedback allocation subtitle

The embodiment of above-described first method utilizes MAC layer subtitle.Being designated " FAST-FEEDBACK " distributes a kind of form of a kind of like this subtitle of subtitle to stipulate in table 4.In certain embodiments, " FAST-FEEDBACK " distribution subtitle is last subtitle by PDU when being used." FAST-FEEDBACK " distributes the support of subtitle is that the PHY standard is relevant.

The quick feedback allocation subtitle of table 4-form

Grammer	Size	Note
			FAST-FEEDBACK allocation Subheader{
Allocation offset	6
			Feedback type	2	The quick DL of 00-measures the quick MIMO feedback of 01-, the quick MIMO feedback of antenna #0 10-, antenna #1 11-MIMO pattern and diversity/AMC model feedback
}

" Allocation offset " field with the form of skew, be unit definition with the time slot from serving the position that the SS that appears at the CID in the general head of MAC sends the feedback channel in the frame that begins of " the quick feedback " uplink bandwidth allocation of time slot of " feeding back fast " feedback message of the connection related with CID value therein.For Fig. 2, beginning of " feedback fast " uplink bandwidth allocation will be the beginning of first fast feedback channel 22, and skew will be corresponding to distributing so that respond the position of the concrete fast feedback channel of BS polling request for SS.Dispensing applications is in the UL of next frame subframe.

" Feedback type " Field Definition BS is to the type of the feedback information of SS request.In certain embodiments, the indication that is used for identifying dissimilar institute's solicited messages comprises the indication that request MIMO pattern and displacement patterns are set.

Value representation in " size " of table 4 row is used to represent the quantity of position of the element of each respective field.For example, 6 of " Allocation offset " field scopes corresponding to from 0 to 63 value.Be appreciated that the just example of each respective field of these values.In certain embodiments, because similar to the above, the quantity of position may be greater than or less than shown in the table 4.

The binary value of " Feedback type " field in " note " of table 4 row with relate to that field specifically can select option related.Be appreciated that each concrete binary value just is used for the example of each concrete option, and concrete option can be represented by any suitable binary value with any suitable figure place.In certain embodiments, if there is the number of options that is greater than or less than concrete sign in the table 4, then Wei quantity may be greater than or less than shown in the table 4.Be appreciated that in addition and the invention is not restricted to determined option in the table.In certain embodiments, may exist more than and/or be different from shown in the option of concrete option.

In general, " feedback fast " distributes subtitle to support the method that is used for distributing at Frame the feedback channel between base station and at least one wireless terminal shown in the flow chart of Fig. 6, and wherein poll is carried out at least one wireless terminal in the base station.This method comprises the position of the feedback channel of base station at least one wireless terminal transmission frame and the type of the feedback information that is just asking the base station.

As mentioned above, MIMO pattern exchange can realize by by BS SS being carried out poll about MIMO pattern and/or displacement patterns for the purpose of SS at a slow speed.In the example of table 4, " Feedback type " field of BS " FAST-FEEDBACK " subtitle is set to occurrence, and for example " 11 " be used for asking will be by the indication of employed MIMO pattern of SS and displacement patterns.The polling interval is to realize being correlated with.In case SS reception this " feedback fast " subtitle, SS sends the indication of MIMO pattern and displacement patterns by distributing fast feedback channel.Table 5 explanation is used for the encoded binary value of payload bits of fast feedback channel and the example that corresponding modes is described.

Table 5-is when the coding of the payload bits during " Feedback type "=' 11 ' in " feed back fast " subtitle.

Value	Describe
		0000	STTD and diversity
0001	STTD and AMC
		0010	SM and diversity
0011	SM and AMC
		0100-1111	Keep

Value representation in " value " row of table 5 comprises four in this case corresponding to the concrete binary number of specific coding scheme.Be appreciated that the just example of each encoding scheme of these values, and encoding scheme can be represented by any suitable binary value with any suitable figure place.In certain embodiments, because similar to the above, the quantity of position may be greater than or less than shown in the table 5.

Feed back fast

Fast feedback report has by SS wherein and distributes the embodiments of the invention of CQICH to realize.Be described in more detail below the method for the CQICH distribution of the IE that is used for providing the DL map component 12 that relates to Fig. 2.Be concrete SS when distributing CQICH, the part of CQICH payload can be used for providing MIMO pattern and displacement patterns to select based on every frame.For example, one of total several positions in the CQICH payload are used to provide quick mode and select feedback.Typical case CQICH has 4 in payload, but being appreciated that the CQICH payload may have is greater than or less than this units.

Payload has in 4 and the current example choosing concrete displacement patterns, for example diversity mode therein, 4 of the CQICH payload are defined as follows: the highest effective 3 are used for showing CQI index or equivalent DIUC, and least significant bit is used for showing the MIMO pattern.This specific coding of 3 is retained the indication of displacement patterns in return, for example from diversity mode to the AMC pattern.

In an example of the operation of the above quick method for reporting, after BS detects the exchange indication, BS may distribute the UL resource to SS immediately, makes SS can send distance measurement request (RNG_REQ) message, and it may comprise the detailed channel quality that reaches 4 or 8 AMC frequency bands.In this message,, comprise antenna index for the MIMO enabled systems for each selected AMC frequency band.BS then sends ranging response (RNG_RSP) message as affirmation/permission.In this example, revise current RNG_REQ message and RNG_RSP message for this purpose.Afterwards, SS begins to send AMC pattern CQICH payload in certain delay (describe (DCD) message or specify in RNG_RSP message at downlink channel).Difference C/I is sent out with the speed of 4AMC frequency band/frame.More in general, the message that sends between SS and BS is not to be specially above-described RNG_REQ and RNG_RSP form, but the message that can be used to ask expected information and confirm any kind of this request subsequently.

Continue to have the example of 4 CQICH payload, another quick method for reporting defines 4 use in such a way: the highest effective 3 differential CQI that are used for reporting selected AMC frequency band, and least significant bit is used for showing MIMO pattern (1=STTD when sending by odd-numbered frame; 0=SM), and when sending, show exchange between the displacement patterns by even frame, for example from the AMC pattern to diversity mode.In certain embodiments, the indication of exchange displacement patterns is set to 1 by this position and carries out.MIMO pattern indicating bit is shared between MIMO pattern report and displacement patterns report with time division multiplexing mode in fact.In certain embodiments, after BS detected this indication, BS should send and initiatively give information, and an example is a RNG_RSP message, as showing that SS begins to send the affirmation of the delay of diversity mode CQICH payload.

In certain embodiments, the additional uplink resource of the report triggering base station assigns that MIMO pattern and/or displacement patterns are set is set relevant additional information so that wireless terminal can be sent with MIMO pattern and/or displacement patterns.

The dynamically use of the CQICH ID of CQICH distribution and DL burst allocation

The embodiment of above-described method of feedback report at a slow speed and quick feedback report method utilizes CQICH.The quantity of available CQICH on the up link depends on and is the up link subcarrier that CQICH distributes and the quantity of OFDM symbol.The CQI feedback is represented the expense of can not ignore on the up link fast, and therefore in certain embodiments, the CQICH resource is suitably distributed with removing different SS dynamic assignment.Dynamic assignment and releasing to different SS distribute and should carry out under the situation that does not cause too much downlink signaling overhead.In certain embodiments, use happens suddenly according to a plurality of bursts rather than according to each and distributes/remove the option that distributes CQICH.

The new UL mapping IE that is designated " CQICH distribution diagram " IE is provided, distributes CQICH so that BS can or be removed given SS dynamic assignment.

The syntactic structure of an embodiment of table 6 definition CQICH allocation map information element.In case through over-allocation, SS comes the transfer channel quality information by the CQICH of distribution that transmits on each subsequent frame, receive another " CQICH distribution diagram " IE until SS and distributed CQICH to discharge.

Table 6-CQICH distribution diagram IE ()

Grammer	Size	Note
			CQICH allocation MAP IE ()
Extended UIUC	4	0x03
			Length
	8	The byte length of follow-up field
			CQICH indicator
	1	If " CQICH distribution diagram " IE is then followed in designator==1.If designator==0 does not then provide " CQICH distribution diagram " IE for this SS.
			if(CQICH indicator)

==1{
			CQICH ID	Variable	The size of this field of index that unique identification has been distributed to the CQICH resource of SS depends on the system parameters that defines among the DCD
Allocation offset	5	CQI report therein should be by the index of the channel in the frame of SS transmission.
			Period (=p)	2	The CQI feedback is by transmitting according to (CQI channel indexes) CQI channel by SS index in every 2p frame.
Frame offset	3	SS begins report with the frame that its numbering has 3 least significant bits (LSB) identical with the designated frame skew.If present frame is designated, then SS should begin to report in 8 frames.
			Duration (=d)	3	The CQI feedback is by being transmitted for the CQI channel of 10 * 2^d frame index by SS according to (CQI channel indexes).If d==0, then CQI-CH is disengaged distribution.If d==111, then SS should report, SS stops up to the BS order.
MIMO permutation feedback cycle	2	0b00=does not have MIMO and displacement patterns feedback 0b01=MIMO and displacement patterns indication and will transmit by per 4 frames of the CQICH of CQICH_ID index.First indication sends on the 8CQICH frame.0b10=MIMO and displacement patterns indication will transmit by per 8 frames of the CQICH of CQICH_ID index.First indication sends on the 8CQICH frame.0b110=MIMO and displacement patterns indication will transmit by per 16 frames of the CQICH of CQICH_ID index.First indication sends on the 16CQICH frame.

Padding	Variable	Filler is used for guaranteeing that the IE size is an integer-bit.
			}
}

" CQICH indicator " field provides the indication of whether following about " CQICH distribution diagram " IE.

" CQICH ID " field unique identification SS can transmit the fast feedback channel 22 of the feedback report information with designated value therein.By this distribution, between CQICH ID and SS, set up one-one relationship.Shown in the embodiment that table 6 is realized, the size of field is defined by downlink channel descriptor (DCD) message.DCD message comprises the message coding of the aspect of further definition downlink transmission.For example, except the size of definition CQICH_ID field, the frame number that other DCD message also relates to sign BS ID, down link central channel frequency, frame duration code and is used for comprising DCD message.

" Allocation offset ", " Frame offset ", " Period " and " Duration " field provide with distribute or remove position and timing information in the relevant frame of the CQICH that distributes.

Whether " MIMO permutation feedback cycle " field provides about not having the indication of MIMO and displacement patterns feedback or provide given regular frame rate for specific MIMO and the indication of displacement patterns feedback.

In certain embodiments, the indication of MIMO and/or displacement patterns feedback provides by different payload bits type of codings.For example go up the type of coding of determining in the table 5.

Value representation in " size " of table 6 row is used to represent the quantity of position of the element of each respective field.Be appreciated that the just example of each respective field of these values.In certain embodiments, because similar to the above, the quantity of position may be greater than or less than shown in the table 6.

In general, " CQICH distribution diagram " IE supports the method to wireless terminal dynamic assignment channel quality indicating channel in the MIMO-OFDM system that is used for shown in the flow chart of Fig. 7.This method comprises that the base station transmits at least one wireless terminal: 1) wireless terminal can transmit the sign of the channel in the Frame of feedback information therein to the base station, 2) position of the channel in the frame, 3) be used to transmit with base station and wireless terminal between the feedback cycle of the relevant feedback information of transmission channel.

MIMO DL strengthens the IE form

When SS is distributed CQICH, as mentioned above, distribute between the CQICH existence to shine upon one to one in SS and institute.Advantageously, after this, in certain embodiments, when distributing the DL burst to SS, length is generally 16 basic CID and can be replaced by size littler " CQICHID ".This replacement reduces the DL signaling consumption.Replace and comprise " CID " field that identifies among employing " CQICH ID " field replacement foregoing " MIMO DL Basic " IE, thereby create alternative DL mapping IE.

Table 7 defines the syntactic structure of the alternative of the MIMO DL map information element that is designated " MIMO DL Enhanced " IE.In alternative, CQICH ID identifier is used for replaced C ID identifier when SS is distributed the DL burst.

In alternative DL mapping, MIMO enables BS and transmits the predefine value equal among " MIMO DLEnhanced " IE, for example equals 15 DIUC, enables the MIMO pattern of the follow-up downlink allocation of SS so that show the specific MIMO that is identified for the CQICH ID that before distributed to SS.In certain embodiments, the MIMO pattern of representing among " MIMO DL Enhanced " IE is only applicable to the end follow-up downlink allocation before of frame.

Table 7-MIMO DL strengthens IE

Grammer	Size	Note
			MIMO DL Enhanced IE(){
Extended DIUC	4	0x06
			Length
	8	Byte length
			Num_Region
	4
			For(i＝0；i<Num Region；i++){
OFDMA Symbol offset	10
			Subchannel offset	5
Boosting	3

No.OFDMA Symbols	9
			No.subchannels	5
Num_layer	2
			for(j＝0；j<Num layer；j++){
if(INC CID＝＝1){
			CQICH ID	8
}
			Layer index	2
DIUC	4	The 0-11 burst profile
			}
}

Value representation in " size " of table 7 row is used to represent the quantity of position of the element of each respective field.Be appreciated that a just example of each respective field of these values.In certain embodiments, because similar to the above, the quantity of position may be greater than or less than shown in the table 7.

Be appreciated that table 1,2,3,4,6 and 7 expressions be provided for shining upon the method for down link in the PHY layer and uplink region and be provided for or relate between BS and the one or more SS at a slow speed and the example of the actual realization of the method for quick feedback report.In other embodiment of the actual realization of these methods, may there be the field of greater or lesser quantity.May need added field that additional information is provided.If the minimizing of field does not change scope of the present invention as herein described in fact, then less field can be used to reduce transport overhead.

Two step resource allocations

Another aspect that embodiments of the invention provide is the method that a kind of help reduces the battery consumption of wireless terminal or SS.In wireless access network, the notion of the IA High Speed Channel (fat pipeline) that a plurality of active terminal are shared is widely accepted.Because channel has high power capacity, therefore a plurality of terminals can be dispatched according to given scheduling interval.If business model presents utmost point bursty nature, then the terminal quantity of being dispatched may be very big.In current system, in each scheduling constantly, network sends resource allocation information by signaling channel or by message.Resource allocation information generally includes a plurality of distribution, because the business of common a plurality of terminals can be dispatched in a scheduling interval.Each resource allocation of SS comprises the ID of SS with the distribution details, as resource allocation description and physical layer parameter, for example HARQ relevant parameter, modulation and code index and MIMO relevant parameter.Therefore, if professional present high suddenly and have more advanced PHY technology, then resource allocation information may be quite long, and the quantity of the position related with distributing details will be higher than the quantity with the related position of ID far away.In order whether to check that for certain terminal scheduling business, terminal must be to whole resource allocation information decoding.This is not a kind of effective method.

Embodiments of the invention propose whole resource allocation information is divided into two parts.First only comprises ID, for example by alarm information, and second portion comprises and distributes details, for example assignment messages.Two decoded separately and transmission of part.

In operation, SS decodes to first.If SS ID exists, then terminal continues the second portion decoding, and attempts searching the distribution details according to the order that SS ID occurs in first.If SS ID is not included in the first, then terminal stops any further process in this scheduling interval.

Like this, the battery consumption of terminal can reduce, because SS is not to decoding with the incoherent information of SS.

The enhancing of idle mode operations-efficient paging process

Random access resource is used for cellular system at present, and it comes self terminal or the uplink resource request of SS and the dual purpose of page response as carrying.In this design, insert request and page response and handle in a similar manner.When terminal response paging or initiation UL transmission, terminal must be carried out tediously long random access procedure (rollback).

Terminal is chance event by the situation itself that adopts access at random to initiate the UL transmission.But it is definite event and can be predicted fully that terminal sends incident to the response of paging.If terminal attempts then can avoiding tediously long random access procedure from BS response paging, because BS knows, paged terminal needs the UL resource to send response to paging when BS sends paging.

In operation, when the BS call terminal, BS gives paged terminal special-purpose UL resource allocation in certain time cycle (response window), so that allow terminal send page response rapidly.Terminal has distributed the UL resource to send page response by adopting.If BS received response before window finishes, then more early remove and distribute private resource.If terminal does not successfully send response during response window, then terminal is carried out conventional random access procedure.

According to above theory, a large amount of modifications and changes of the present invention are feasible.Therefore, should be appreciated that within the scope of the appended claims, can implement the present invention not according to specifying of this paper.

Claims (23)

1. one kind is used for enabling the method that ofdm system is realized from the base station downlink transmission of at least one wireless terminal at MIMO, and described method comprises:

The sum in the zone that comprises information is transmitted to described at least one wireless terminal in described base station, and the described information in the described zone will be transmitted subsequently;

For each zone in total several zones, transmit to described at least one wireless terminal described base station;

Position according to the described zone in the Frame of two-dimensional representation;

Be used for transmitting the diversity multiplexed format of the information in the zone that is positioned at described frame;

As the position in the third dimension in the zone of one of total several layers;

For each layer in total several layers, transmit transmission profile and be used to identify the identifier that is connected between described base station and described at least one wireless terminal.

2. the method for claim 1 is characterized in that, described two dimension comprises as first dimension of number of sub-channels and as second of OFDMA symbol quantity to be tieed up.

3. the method for claim 1 is characterized in that, the number of sub-channels that OFDMA symbol quantity that the position in the described zone in the described Frame takies by OFDMA symbol offset, subchannel offset, described zone and described zone take is represented.

4. the method for claim 1 is characterized in that, described transmission profile is that downlink interval is used code (DIUC).

5. the method for claim 1 is characterized in that, described diversity multiplexed format is by being used to show that the designator of predefine matrix transformat defines.

6. the method for claim 1 is characterized in that, described identifier is the connection identifier that is connected (CID) that is used between described base station and described at least one wireless terminal.

7. the method for claim 1 is characterized in that, described identifier is unique value of distributing to single wireless terminal in finite duration.

8. method as claimed in claim 7 is characterized in that, described identifier is channel quality identification channel (CQICH) identifier.

9. as each the described method among the claim 1-5, it is characterized in that transmit in the described downlink information element that is transmitted in Frame, described Frame is sent to described at least one wireless terminal from described base station.

10. as each the described method among the claim 1-5, it is characterized in that described transmission usually transmits according to the downlink information unit of Frame, described downlink information element comprises the data field of each respective transmissions that is used for described base station.

11. method as claimed in claim 10 is characterized in that, each data field is by one or more bit stealings.

12. method as claimed in claim 9 is characterized in that, described downlink information element comprises following form:

Grammer Size Note MIMO DL Basic IE(){ Extended DIUC 4 0x05 Length 8 Length with byte representation Num Region 4 For(i＝0；i<Num Region；i++){ OFDMA Symbol offset 10 Subchannel offset 5 Boosting 3 No.OFDMA Symbols 9 No.subchannels 5 Matrix indicator 3 STC matrix 000=matrix A 001=matrix B 010=Matrix C 011=matrix D 100=matrix E 101-111=keeps

Num layer 2 for(j＝0；j<Num layer；j++){ If(INC CID＝＝1) { CID 16 } Layer index 2 DIUC 4 The 0-11 burst profile } }

13. method as claimed in claim 9, it is characterized in that, described identifier is that unique value and described identifier of distributing to single wireless terminal is channel quality identification channel (CQICH) identifier in finite duration, and described downlink information element comprises following form:

Grammer Size Note MIMO DL Enhanced IE(){ Extended DIUC 4 0x06 Length 8 Length with byte representation Num_Region 4 For(i＝0；i<Num Region；i++){ OFDMA Symbol offset 10 Subchannel offset 5 Boosting 3 No.OFDMA Symbols 9 No.subchannels 5 Num_layer 2 for(j＝0；j<Num layer；j++){ If(INC CID＝＝1){ CQICH ID 8 }

Layer index 2 DIUC 4 The 0-11 burst profile } }

14. one kind is used for enabling the method that ofdm system is realized the ul transmissions from least one wireless terminal to the base station at MIMO, described method comprises:

The sum of the range of distribution that comprises the information that will be transmitted by described at least one wireless terminal is transmitted to described at least one wireless terminal in described base station, and described zone will be transmitted subsequently;

For each range of distribution:

Transmit transmission profile and be used to identify the identifier that is connected between described base station and described at least one wireless terminal; And

Transmission is used for transmitting the diversity multiplexed format of the described information that is positioned at described range of distribution.

15. method as claimed in claim 14 is characterized in that, when described at least one wireless terminal had at least two transmitting antennas, described diversity multiplexed format was by being used to show that the designator of predefine matrix transformat defines.

16. method as claimed in claim 14, it is characterized in that, described diversity multiplexed format is defined by the designator of the first subcarrier pilot frequency mode that is used to show first wireless terminal with single transmit antenna, described first wireless terminal is used in combination with second wireless terminal that has the single transmit antenna and have second a subcarrier pilot frequency mode, and described two wireless terminals provide the collaboration space multiplex diversing.

17. each the described method as among the claim 14-16 is characterized in that, transmits in the described up-link information element that is transmitted in Frame, described Frame is sent to described at least one wireless terminal from described base station.

18. each the described method as among the claim 14-16 is characterized in that described transmission usually transmits according to the up-link information unit of Frame, described up-link information element comprises the data field of each respective transmissions that is used for described base station.

19. method as claimed in claim 18 is characterized in that, each data field is by one or more bit stealings.

20. method as claimed in claim 17 is characterized in that, described up-link information element comprises following form:

Grammer Size Note MIMO UL Basic IE(){ Extended UIUC 4 0x02 Length 4 Length with byte representation Num Assign For(i＝0；i<Num Assign；i++){ CID 16 The basic CID of SS UIUC 4 MIMO Control 1 For SS 0:STTD with two transmittabilities; 1:SM is for the SS 0 with cooperation SM ability: pilot frequency mode A; 1: pilot frequency mode B Duration 48 In the OFDMA time slot } }

21. method as claimed in claim 14 is characterized in that, described transmission profile is that uplink interval is used code (UIUC).

22. method as claimed in claim 14 is characterized in that, described identifier is the connection identifier that is connected (CID) that is used between described base station and described at least one wireless terminal.

23. a MIMO enables the transmitter in the ofdm communication system, comprising:

At least two antennas;

At least one encoder is used for the OFDM symbols streams is encoded, to produce the coded OFDM symbols streams;

At least one modulator is used for the coded OFDM symbols streams is modulated, to produce the OFDM symbols streams of modulation;

Be used for the OFDM symbols streams of one or more modulation is carried out space time coding, with the device of the space time coded OFDM symbol that transmits on the one or more antennas that are created in described at least two antennas; And

Be used for being created in the device of the OFDM frame that transmits between transmitter and at least one wireless terminal, this OFDM frame comprises space time coded OFDM symbol and at least one map element, and described map element is configured to:

For at least one wireless terminal, define the sum in the zone of the frame that comprises information, the information in the described zone will be transmitted subsequently;

For described at least one wireless terminal in each zone in total several zones, definition:

Position according to the described zone in the frame of two-dimensional representation;

Be used for transmitting the diversity multiplexed format of the information in the zone that is positioned at described frame;

As the position in the third dimension in the zone of one of total several layers;

For each layer of total several layers, definition transmission profile and be used for the identifier that is connected between marking emitter and at least one wireless terminal.

Images