CN102035782A - Mapping method and device for demodulation reference symbol in expansion of cyclic prefix - Google Patents

Abstract

The invention discloses a mapping method and device for a demodulation reference symbol in expansion of a cyclic prefix, used for implanting that, in an LTE-A system, UE identifies channel response characteristics on a plurality of transmission layers so as to estimate channel response of each layer. In the mapping method and device, under a condition of expansion of the cyclic prefix, a demodulation data reference pilot frequency is arranged as much as possible on an OFDM symbol which is not conflicted with other signals, thereby avoiding the conflict between the demodulation reference symbol and a control channel and the conflict between a public pilot frequency and a channel state reference symbol, simultaneously, the overhead of the demodulation reference symbol is reduced greatly, so that channel estimation performance and cost can be balanced well.

Description

The mapping method of demodulation reference mark and device in the extended cyclic prefix

Technical field

The present invention relates in the wireless communication system, particularly in the LTE-A system, under the extended cyclic prefix pattern, the method for designing of demodulation reference mark and device.

Background technology

The high-order multi-antenna technology is one of key technology of senior Long Term Evolution (LTE-A or LTE-Advanced, Long Term Evolution Advanced) system, in order to improve system transmissions speed.In order to realize introducing channel quality measurement and the data demodulates behind the high-order multi-antenna technology, the LTE-Advanced system has defined two class reference symbols respectively: demodulation reference mark (DMRS, Demodulation Reference Signal) and channel status reference symbol (CSI-RS, Channel State Information-Reference Signal), wherein, demodulation reference mark is used for Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel).The channel status reference symbol is used for channel quality indication (CQI, Channel Quality Indicator), pre-coding matrix is indicated reporting of (PMI, Precoding Matrix Indicator), stratum's indication information such as (RI, Rank Indicator).The structure of two class reference symbols can be used for supporting as multipoint cooperative (CoMP, Coordinated Multi-Point), the new technical feature of LTE-A such as spatial reuse.

In LTE, that adopt is common reference symbol (Common Reference Signal, CRS) carry out pilot measurement, just all users use common reference symbol to carry out channel estimating, this common reference symbol need emitting side additionally notify receiving terminal emission The data which kind of pretreatment mode, and expense is bigger, in addition at multiuser mimo system (Multiuser Multiple-Input Multiple-Output, MU-MIMO) in, because a plurality of UE are using identical CRS, can't realize the quadrature of pilot tone, therefore be unable to estimate interference.

In LTE-A, in order to reduce the expense of pilot tone, channel status reference symbol and demodulation reference mark are separately designed, the pretreatment mode that demodulation reference mark is identical with The data, simultaneously (order is meant the order of the channel matrix correspondence that forms between the receiving-transmitting sides antenna according to the described demodulation reference mark of available order information mapping of dispatched users respective channels, available order number is meant that characteristic value in the corresponding current channel matrix satisfies the characteristic value number of certain constraints, when the characteristic value number that satisfies constraints is low, be called low rank channel; When the number that satisfies condition is higher, be called high order channel), therefore can adaptively adjust expense according to order information, like this in the lower situation of order, can reduce expense greatly.Present LTE-A designs formed consistent viewpoint to demodulation reference mark and comprises:

Terminal distinctive (UE-specific), as: the precoding processing that the demodulation reference mark of particular terminal correspondence is identical with the The data of dispatched users.

-only exist only in network side (as eNodeB) on transfer of data institute scheduled resources and the layer.

-at network side, the reference symbol of transmitting on the different layers is mutually orthogonal.

The design criterion of demodulation reference mark is that the specific reference symbol of terminal that is used for the wave beam forming transmission that defines in the LTE R8 protocol version is expanded to multilayer.

In 58 meetings of 3GPP, passed through under the normal cyclic prefix situation baseline (baseline) of the demodulation reference mark design of the double-deck wave beam forming of R9 (dual-layer beamforming).But still the demodulation reference mark method for designing of LTE R9 and LTE-A (R10) under the extended cyclic prefix pattern is not discussed.

This patent mainly is under the extended cyclic prefix pattern of considering, the design problem of demodulation reference mark.In LTE-A, under the pattern of extended cyclic prefix, a Resource Block (Resource Block, RB) structure chart as shown in Figure 7, a RB accounts for 12 subcarriers among Fig. 7 on frequency domain, on time domain, account for 12 OFDMs (Orthogonal Frequency Division Multiplexing, OFDM) symbol, the carrying that wherein preceding 4 OFDM symbols are used for control channel (wherein, when having only system bandwidth smaller or equal to 10 times of RB frequency domain bandwidth, just use 4 OFDM symbols to be used to carry control channel), therefore on preceding 4 OFDM, should try one's best and not carry any proprietary demodulation reference mark.Dash area is the public reference signal that defines among the LTE among Fig. 7.Because LTE allows the common reference symbol of different districts to carry out translation (a kind of frequency hopping mode) on the different sub carrier of same OFDM symbol, in order to keep backward compatibility with LTE, in the RB of LTE-A, still keep these common reference symbol and frequency hopping form thereof, so these Resource Units (Resource Element, RE) can not carry any proprietary demodulation data reference signal on the OFDM symbol at place, should avoid and the conflicting of these symbols as far as possible.

Summary of the invention

In view of this, main purpose of the present invention is to provide the mapping method and the device of demodulation reference mark in a kind of extended cyclic prefix, be used for being implemented in the LTE-A system, UE is identified in a plurality of transport layer upper signal channel response characteristics, thereby estimates the channel response on each layer.

For achieving the above object, technical scheme of the present invention is achieved in that

The mapping method of demodulation reference mark in the extended cyclic prefix in a kind of advanced long-term evolution system comprises:

The time-domain position of demodulation reference mark of carrying advanced long-term evolution system is positioned on shared OFDM (OFDM) symbol of not Be Controlled channel, common reference symbol and witness mark symbol, and therefrom selects one or more OFDM symbols to be used to carry described demodulation reference mark;

Demodulation reference mark between a plurality of layers is divided by frequency division, time-division, sign indicating number or the mode of multiple multiplex mode mixing is carried out orthogonal multiplex.

Further, the compound mode of OFDM symbol of carrying described demodulation reference mark is for adopting in following three kinds of modes any one:

A1, described demodulation reference mark maximum take 4 OFDM symbols, and be mapped on the the the 5th, the 6th, the 11st and the 12nd the OFDM symbol or the the the 5th, the 6th, the 9th and the 11st OFDM symbol on;

A2, described demodulation reference mark maximum take 2 OFDM symbols, and be mapped on the 5th and the 12nd the OFDM symbol or the 5th and the 11st OFDM symbol on;

A3, described demodulation reference mark maximum take 3 OFDM symbols, and be mapped on the the 5th, the 9th and the 12nd the OFDM symbol, perhaps on the the 5th, the 8th and the 12nd OFDM symbol, perhaps on the the 5th, the 9th and the 11st OFDM symbol or on the the 5th, the 8th and the 11st OFDM symbol.

Further, the multiplex mode that adopts between described a plurality of layer is any one in the following mode:

Adopt the mode of code division multiplexing between B1, each layer;

Adopt frequency division and/or time-multiplexed mode between B2, each layer, classify according to the employed number of layers of network side simultaneously, under the different class situations, in each Resource Block every layer according to different densities Resources allocation unit (RE);

B3, in number of layers smaller or equal to 2 o'clock, adopt the mode of code division multiplexing between each layer; In number of layers greater than 2 o'clock, the hybrid multiplex mode that adopts code division multiplexing to combine between each layer with frequency division and/or time division multiplexing;

B4, in number of layers smaller or equal to 2 or smaller or equal to 4 o'clock, adopt frequency division and/or time-multiplexed mode between each layer; Greater than 2 or greater than 4 o'clock, adopt frequency division and/or time-division to divide the hybrid multiplex mode that combines in number of layers between each layer with sign indicating number.

Further, number of layers according to the actual use of system is classified to layer, for the map type in given number of layers interval, described a plurality of layers is divided into groups, adopt different multiplex modes between the respective layer of described grouping, concrete packet mode is any one in the following mode:

C1, the same group of interior mode that adopts code division multiplexing, the mode of employing time-division and/or frequency division multiplexing between the group;

C1, the same group of interior mode that adopts time-division and/or frequency division multiplexing, the mode of employing code division multiplexing between the group.

Further, every layer in the inhomogeneity adopts identical or different average pilot density; Between the of a sort different layers, it is identical that the density of every layer demodulation data reference signal keeps.

Based on preceding method, further, the number of layers of using according to reality is divided into mapping of low-rank class and the mapping of high order class with the type of shining upon, and for described low-rank class mapping, the demodulation reference mark overhead on all layers is 8RE/RB or 12RE/RB; For described high order class mapping, the overhead of the demodulation reference mark on all layers is 24RE/RB, perhaps 16RE/RB, perhaps 18RE/RB.

Further, the selection mode of the time-domain position of described demodulation reference mark is any one in the following mode:

D1, when adopting code division multiplexing or code division multiplexing and frequency division and/or time division mixed multiplexing mode between the different layers, the time-domain position of described demodulation reference mark is positioned on the Resource Unit of the 5th, the 6th OFDM symbol and the 11st of a Resource Block, the 12nd OFDM symbol or the 5th, the 6th OFDM symbol and the 9th, the 11st OFDM symbol correspondence;

D2, when adopting frequency division and/or time division multiplexing mode between the different layers, the time-domain position of demodulation reference mark is positioned at the the 5th, the 9th and the 12nd OFDM symbol of a Resource Block, perhaps the the 5th, the 9th and the 11st OFDM symbol.

Further, on each OFDM symbol, two adjacent Resource Units of every layer of demodulation reference mark be spaced apart 3 or 4 Resource Units; Perhaps on each OFDM symbol, with 2 or 3 Resource Units of being spaced apart of adjacent two demodulation reference mark of one deck.

Based on the method for the invention, the present invention also proposes in a kind of advanced long-term evolution system the mapping device of demodulation reference mark in the extended cyclic prefix,

Described mapping device is used for shining upon demodulation reference mark at the Resource Block that adopts extended cyclic prefix;

Described mapping device is on the time domain direction, never select one or more OFDM symbols to be used to carry described demodulation reference mark in the OFDM symbol that Be Controlled channel, common reference symbol and witness mark symbol take, and the mode of mixing by frequency division, time-division, sign indicating number branch or multiple multiplex mode between a plurality of layers is carried out orthogonal multiplex.

Further, when described mapping device is selected the OFDM symbol of the described demodulation reference mark of carrying, adopt in following three kinds of modes any one:

E1, described demodulation reference mark maximum take 4 OFDM symbols, and it is mapped on the the the 5th, the 6th, the 11st and the 12nd the OFDM symbol or the the the 5th, the 6th, the 9th and the 11st OFDM symbol on;

E2, described demodulation reference mark maximum take 2 OFDM symbols, and it is mapped on the 5th and the 12nd the OFDM symbol or the 5th and the 11st OFDM symbol on;

E3, described demodulation reference mark maximum take 3 OFDM symbols, and it is mapped on the the 5th, the 9th and the 12nd the OFDM symbol, perhaps on the the 5th, the 8th and the 12nd OFDM symbol, perhaps on the the 5th, the 9th and the 11st OFDM symbol or on the the 5th, the 8th and the 11st OFDM symbol.

Further, the multiplex mode of described mapping device employing between a plurality of layers when the described demodulation reference mark of mapping is any one in the following mode:

Adopt the mode of code division multiplexing between F1, each layer;

Adopt frequency division and/or time-multiplexed mode between F2, each layer, classify according to the employed number of layers of network side simultaneously, under the different class situations, in each Resource Block every layer according to different densities Resources allocation unit;

F3, in number of layers smaller or equal to 2 o'clock, adopt the mode of code division multiplexing between each layer; In number of layers greater than 2 o'clock, the hybrid multiplex mode that adopts code division multiplexing to combine between each layer with frequency division and/or time division multiplexing;

F4, in number of layers smaller or equal to 2 or smaller or equal to 4 o'clock, adopt frequency division and/or time-multiplexed mode between each layer; Greater than 2 or greater than 4 o'clock, adopt frequency division and/or time-division to divide the hybrid multiplex mode that combines in number of layers between each layer with sign indicating number.

Further, described mapping device is classified according to the number of layers of the actual use of system, for the class in given number of layers interval, described a plurality of layers is divided into groups, adopt different multiplex modes between the respective layer of described grouping, concrete packet mode is any one in the following mode:

G1, the same group of interior mode that adopts code division multiplexing, the mode of employing time-division and/or frequency division multiplexing between the group;

G2, the same group of interior mode that adopts time-division and/or frequency division multiplexing, the mode of employing code division multiplexing between the group.

Further, every layer in the inhomogeneity adopts identical or different average pilot density; Between the of a sort different layers, it is identical that the density of every layer demodulation data reference signal keeps.

Further, the number of layers that described mapping device uses according to reality is divided into mapping of low-rank class and the mapping of high order class with the type of shining upon, and for described low-rank class mapping, the demodulation reference mark overhead on all layers is 8RE/RB or 12RE/RB; For described high order class mapping, the overhead of the demodulation reference mark on all layers is 24RE/RB, perhaps 16RE/RB, perhaps 18RE/RB.

Further, described mapping device when selecting the time-domain position of described demodulation reference mark, in any one in the following ways:

H1, when adopting code division multiplexing or code division multiplexing and frequency division and/or time division mixed multiplexing mode between the different layers, the time-domain position of described demodulation reference mark is positioned on the Resource Unit (RE) of the 5th, the 6th OFDM symbol and the 11st of a Resource Block, the 12nd OFDM symbol or the 5th, the 6th OFDM symbol and the 9th, the 11st OFDM symbol correspondence;

H2, when adopting frequency division and/or time division multiplexing mode between the different layers, the time-domain position of demodulation reference mark is positioned at the the 5th, the 9th and the 12nd OFDM symbol of a Resource Block, perhaps the the 5th, the 9th and the 11st OFDM symbol.

Further, described mapping device when hinting obliquely at described demodulation reference mark, on each OFDM symbol, two adjacent Resource Units of every layer of demodulation reference mark be spaced apart 3 or 4 Resource Units; Perhaps with 2 or 3 Resource Units of being spaced apart of adjacent two demodulation reference mark of one deck.

Taken into full account among the present invention under the extended cyclic prefix situation, the demodulation data reference pilot tone is arranged in not on the OFDM symbol with other signal conflicts as far as possible, thereby avoided the collision problem of demodulation reference mark and control channel and public guide frequency thereof and channel status reference symbol, the overhead issues of simultaneously abundant demodulation reference mark.Trade off thereby make to access between channel estimating performance and the expense preferably.

Description of drawings

Fig. 1-1A to 1-1C is the mapping mode schematic diagram that the present invention is based on demodulation reference mark under the multiplexing extended cyclic prefix pattern of CDM;

Fig. 2-1A to 2-1C is the mapping mode schematic diagram that the present invention is based on demodulation reference mark under the multiplexing extended cyclic prefix pattern of CDM;

Fig. 3-1A to 3-1C is for the present invention is based under FDM and/or the TDM multiplex mode demodulation reference mark mapping method schematic diagram when taking 4 OFDM symbols;

Fig. 3-2A to 3-2C is for the present invention is based under FDM and/or the TDM multiplex mode demodulation reference mark mapping method schematic diagram when taking 2 OFDM symbols;

Fig. 4-1A to 4-1C is for the present invention is based under FDM and/or the TDM multiplex mode, and resource overhead is 16RE and maximum demodulation reference mark mapping method schematic diagram when taking 4 OFDM symbols to the maximum;

Fig. 4-2A to 4-2C is for the present invention is based under FDM and/or the TDM multiplex mode, and resource overhead is 16RE and maximum demodulation reference mark mapping method schematic diagram when taking 2 OFDM symbols to the maximum;

Fig. 5-1A to 5-1C is that base of the present invention is based on FDM and/or TDM and CDM hybrid multiplex demodulation reference mark mapping mode schematic diagram;

Fig. 6-1A to 6-1C is the mapping mode schematic diagram of base of the present invention based on CDM and FDM and/or TDM hybrid multiplex;

Fig. 6-2A to 6-2C is the mapping mode schematic diagram 2 of base of the present invention based on CDM and FDM and/or TDM hybrid multiplex;

Fig. 7 is the interior framework of the RB of an extended cyclic prefix of LTE system, and the physical resource position view at public reference signal and control signaling place thereof.

Embodiment

What the present invention mainly paid close attention to is the problem of the mapping mode of demodulation reference mark in the LTE-A system, in view of in the LTE-A system, the mapping of descending demodulation reference mark is finished by network side entity usually, therefore will be used for finishing demodulation reference mark at the abstract mapping device that is expressed as of the entity of the mapping function of Resource Block among the present invention, especially, this mapping device especially is used for finishing the function of mapping demodulation reference mark in the Resource Block that adopts extended cyclic prefix in the present invention, described mapping device is on the time domain direction, never Be Controlled channel, select one or more OFDM symbols to be used to carry described demodulation reference mark in the OFDM symbol that common reference symbol and witness mark symbol take, and between a plurality of layers, pass through frequency division, time-division, the mode that sign indicating number divides or multiple multiplex mode mixes is carried out orthogonal multiplex.

For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.

During embodiment below describes, be 8 to be described all with maximum number of layers, in the description process, according to the interval under the number of layers, number of layers is classified: number of layers is smaller or equal to 2, number of layers is greater than 2 smaller or equal to 4, and number of layers also can be merged into a class with preceding two classes greater than 4. in certain embodiments.

Specific embodiment 1:

Fig. 1-1 adopts under the extended cyclic prefix situation for the present invention, based on code division multiplexing (Code Division Multiplexing, demodulation reference mark mapping mode schematic diagram CDM).

Fig. 1-1 provided in number of layers smaller or equal to 2 o'clock, and overhead is 12RE/RB; Number of layers has 24 Resource Units (RE) greater than 2 o'clock overheads in each Resource Block (RB), i.e. the concrete mapping mode of 24RE/RB.Based on this mode, can be divided into 3 classes according to the interval under the number of layers: number of layers belong to 1,2}, number of layers belong to 3, and 4} and number of layers belong to 5,6,7,8}.Fig. 1-1A, Fig. 1-1B, Fig. 1-1C have illustrated number of layers that network side uses smaller or equal to 2, greater than 2 and smaller or equal to 4 and greater than the mapping mode of the demodulation reference mark of 4 o'clock correspondences, under this mode, CDM is multiplexing preferentially to carry out in time domain respectively.

Concrete mapping mode is: under the extended cyclic prefix pattern, preceding 4 OFDM symbols are used for the transmission (wherein the 4th OFDM symbol only is used for the PDCCH transmission during smaller or equal to the frequency domain bandwidth of 10 RB in system bandwidth) of down control channel, 1st, 2,4,7,8,10 OFDM symbols are used for the transmission (when having only 2 antenna ports, being used to carry CRS on the 1st, 4,5,10 the OFDM symbol) of LTE R8 CRS.In LTE-A, the frequency pilot sign in that full bandwidth exists except the CRS among the LTE R8, also comprises the CSI-RS that is used for channel measurement.Therefore need to consider that time domain avoids and the conflicting of CSI-RS, if only keep 2 road CRS among the LTE-A, then CSI-RS can be mapped on the 2nd and the 8th the OFDM symbol under the situation of extended cyclic prefix.

Based on above-mentioned analysis, the OFDM symbol that demodulation reference mark can be mapped to is the 5th, 6,9,11,12 an OFDM symbol.Preferentially consider because CDM is multiplexing, therefore should guarantee the orthogonality of time-domain position as far as possible, that is to say that channel should remain unchanged on the multiplexing two or more RE of CDM as far as possible, therefore select the 5th, 6,11,12 symbols as carrying DMRS in time domain.

Consider that simultaneously each user's data resource only distributes a Resource Block probably, therefore in the present embodiment, demodulation reference mark is positioned at the frequency domain marginal position of RB as far as possible.

In the present embodiment, the number of layers of using when network side is smaller or equal to 2 the time, corresponding demodulation reference mark mapping pattern is shown in Fig. 1-1A, shared RE position is respectively (x, y), wherein x represents the index of OFDM symbol, y represents the relative subcarrier sequence number in the RB, under the mapping mode shown in Fig. 1-1A, with the demodulation reference mark of one deck 4 (the demodulation reference mark frequency domain interval is the interval between the adjacent R E that shines upon on the demodulation reference mark frequency domain with one deck) that are spaced apart at frequency domain, the value of x and y is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3,x_4\}=\left\{\mathrm{5,6,11,12}\right\}\\ y=\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,y_3\}=\left\{\mathrm{1,6,11}\right\}\end{array}\right.$

Layer 1 and layer 2 are on the two adjacent OFDM symbol simultaneously, carry out code division multiplexing with Walsh (walsh) sign indicating number on the corresponding same frequency position, promptly layer 1, layer 2 are in that by length to be that 2 walsh sign indicating number carries out on the RE of the same frequency position of carrying demodulation reference mark on the 5th, 6 and the 11st, 12 the OFDM symbol respectively multiplexing, as the RE position that oval frame comprised among the figure.Concrete, the RE that shines upon DMRS is divided into 6 groups: { (x ₁, y ₁), (x ₂, y ₁), { (x ₃, y ₁), (x ₄, y ₁), { (x ₁, y ₂), (x ₂, y ₂), { (x ₃, y ₂), (x ₄, y ₂), { (x ₁, y ₃), (x ₂, y ₃), { (x ₃, y ₃), (x ₄, y ₃), it is multiplexing by the walsh sign indicating number demodulation reference mark of layer 1 and layer 2 to be carried out CDM between two RE in same group.

Fig. 1-1B has provided based on the 1-1A basis, the number of layers L that uses when system belong to set 3, the mapping method of the demodulation reference mark during 4}, the value of x and y is respectively at this moment

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3,x_4\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

Adopting length this moment is 4 walsh sign indicating number, has marked the RE group of carrying out code division multiplexing with oval frame equally among Fig. 1-1B.Concrete, be divided into 6 groups equally, it is multiplexing by the walsh sign indicating number demodulation reference mark of layer 1, layer 2, layer 3, layer 4 to be carried out CDM between four RE in same group.6 groups of RE are respectively:

Group 1:{ (x ₁, y ₁), (x ₂, y ₁), (x ₁, y ₂), (x ₂, y ₂),

Group 2:{ (x ₃, y ₁), (x ₄, y ₁), (x ₃, y ₂), (x ₄, y ₂),

Group 3:{ (x ₁, y ₃), (x ₂, y ₃), (x ₁, y ₄), (x ₂, y ₄),

Group 4:{ (x ₃, y ₃), (x ₄, y ₃), (x ₃, y ₄), (x ₄, y ₄),

Group 5:{ (x ₁, y ₅), (x ₂, y ₅), (x ₁, y ₆), (x ₂, y ₆),

Group 6:{ (x ₃, y ₅), (x ₄, y ₅), (x ₃, y ₆), (x ₄, y ₆)

Consider when number of layers only was used for the low speed scene greater than 2 o'clock, carry out the multiplexing RE group technology of CDM and also can divide into groups according to following mode:

Group 1:{ (x ₁, y ₁), (x ₂, y ₁), (x ₃, y ₁), (x ₄, y ₁),

Group 2:{ (x ₁, y ₂), (x ₂, y ₂), (x ₃, y ₂), (x ₄, y ₂),

Group 3:{ (x ₁, y ₃), (x ₂, y ₃), (x ₃, y ₃), (x ₄, y ₃),

Group 4:{ (x ₁, y ₄), (x ₂, y ₄), (x ₃, y ₄), (x ₄, y ₄),

Group 5:{ (x ₁, y ₅), (x ₂, y ₅), (x ₃, y ₅), (x ₄, y ₅),

Group 6:{ (x ₁, y ₆), (x ₂, y ₆), (x ₃, y ₆), (x ₄, y ₆)

Fig. 1-1C then based on Fig. 1-1A and Fig. 1-1B further provided the number of layers of using when system belong to 5,6,7, the mapping method of the demodulation reference mark during 8}, this moment, value and the number of layers of x and y were that 4 o'clock RE position is identical, were respectively:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3,x_4\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

Adopting length this moment is 8 walsh sign indicating number, carries out among the CDM multiplexing one group of RE such as the oval frame among Fig. 1-1C The position of corresponding shade RE correspondence.Be divided into 3 group with all RE this moment, and it is multiplexing by the walsh sign indicating number demodulation reference mark of layer 1, layer 2, layer 3, layer 4 to be carried out CDM between 8 RE in same group.Three groups of RE are as follows:

Group 1:{ (x ₁, y ₁), (x ₂, y ₁), (x ₃, y ₁), (x ₄, y ₁), (x ₁, y ₂), (x ₂, y ₂), (x ₃, y ₂), (x ₄, y ₂);

Group 2:{ (x ₁, y ₃), (x ₂, y ₃), (x ₃, y ₃), (x ₄, y ₃), (x ₁, y ₄), (x ₂, y ₄), (x ₃, y ₄), (x ₄, y ₄);

Group 3:{ (x ₁, y ₅), (x ₂, y ₅), (x ₃, y ₅), (x ₄, y ₅), (x ₁, y ₆), (x ₂, y ₆), (x ₃, y ₆), (x ₄, y ₆)

Carry out when multiplexing when adopting the CDM mode between the different layers, for make number of layers more after a little while pattern and number of layers pattern is as far as possible compatible more for a long time, orthogonal code when the orthogonal code that layer uses during low number of layers should be with high number of layers on one group of corresponding RE is consistent as far as possible, concrete, a kind of orthogonal code method of salary distribution is as follows, as can be seen, in the method for salary distribution below, the layer of low sequence number, under the different situation of the number of layers of network side use, be to use the number of layers repetition of corresponding sequence more after a little while.

Number of layers belong to 1, during 2}, the walsh sign indicating numbers that layer 1 and layer 2 use are:

$\left\{\begin{array}{cc}{l}_1:1& 1\\ l_2:1& -1\end{array}\right.$

Number of layers belong to 3, during 4}, the walsh sign indicating number of each layer use is:

$\left\{\begin{array}{cccc}{l}_1:1& 1& 1& 1\\ l_2:1& -1& 1& -1\\ l_3:1& 1& -1& -1\\ l_4:1& -1& -1& 1\end{array}\right.$

Number of layers belong to 5,6,7, during 8}, the walsh sign indicating number of each layer use is:

$\left\{\begin{array}{cccccccc}{l}_1:1& 1& 1& 1& 1& 1& 1& 1\\ l_2:1& -1& 1& -1& 1& -1& 1& -1\\ l_3:1& 1& -1& -1& 1& 1& -1& -1\\ l_4:1& -1& -1& 1& 1& -1& -1& 1\\ l_5:1& 1& 1& 1& -1& -1& -1& -1\\ l_6:1& 1& -1& -1& -1& -1& 1& 1\\ l_7:1& -1& -1& 1& -1& 1& 1& -1\end{array}\right.$

At Fig. 1-1A, 1-1B, the demodulation reference mark mapping position shown in the 1-1C is not considered to carry out the scene that combined channel is estimated between the different RB, is unfavorable for the performance when improving adjacent R B combined channel estimates.In actual applications, if consider can carry out between the adjacent RB situation that combined channel is estimated, then can be to Fig. 1-1A, 1-1B, the frequency domain position shown in the figure among the 1-1C is revised, x among Fig. 1-1A, the value of y can be modified to:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3,x_4\}=\left\{\mathrm{5,6,11,12}\right\}\\ y=\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,y_3\}=\left\{\mathrm{2,6,10}\right\}\end{array}\right.$

X among Fig. 1-1B and the 1-1C, the y value can be modified to:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3,x_4\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{2,3,6,7,10,11}\right\}\end{array}\right.$

In some scene, for example when introducing relay station (relay), because the transmitting-receiving of relay conversion need be used for the transmitting-receiving switching for relay reserves an OFDM symbol, this moment, last OFDM symbol might be unfavorable for placing demodulation reference mark.The value of above-mentioned x can be revised as x ∈ 5,6,9,11}.

Specific embodiment 2:

Under expansion CP situation, because circulating prefix-length is bigger, the therefore actual RE quantity that can be used to transmit the PDSCH data will reduce, in this case, for the expense that guarantees pilot tone in a reasonable range, can consider to reduce the expense of DMRS with respect to the normal cyclic prefix situation.A kind of consideration be in number of layers smaller or equal to 2 o'clock, it is identical with embodiment 1 that the expense of DMRS keeps, and number of layers was only used 16 RE greater than 2 o'clock.Or in number of layers smaller or equal to 2 o'clock, the overhead of DMRS is 8 RE, and number of layers was only used 16 RE greater than 2 o'clock.When number of layers smaller or equal to 2 the time, overhead keeps the DMRS mapping mode identical with embodiment 1 to describe at embodiment 1, mainly describes expense and embodiment 1 asynchronous situation here.Fig. 2-1 has provided the mapping mode schematic diagram of a kind of DMRS that requires based on the present embodiment expense, among the figure, is used to transmit the RE shade of DMRS

Expression.The walsh sign indicating number occupation mode of present embodiment correspondence, and multiplex mode is identical with embodiment 1, is not giving unnecessary details, because mapping mode and multiplex mode are only described in the minimizing of RE number here.

In the present embodiment, the number of layers of using when network side is smaller or equal to 2 the time, and corresponding demodulation reference mark pattern is shown in Fig. 2-1A.Shared RE position is used (x, y) expression equally.Under the mapping mode shown in Fig. 2-1A, with the demodulation reference mark of one deck frequency domain be spaced apart 5, the value of x and y is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3,x_4\}=\left\{\mathrm{5,6,11,12}\right\}\\ y=\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,y_2\}=\left\{\mathrm{3,9}\right\}\end{array}\right.$

The packet mode of this moment is similar to Example 1, just lacks one group of RE than embodiment 1 on frequency domain position, and corresponding packet mode is the RE that shines upon DMRS to be divided into 4 groups: { (x ₁, y ₁), (x ₂, y ₁), { (x ₃, y ₁), (x ₄, y ₁), { (x ₁, y ₂), (x ₂, y ₂), { (x ₃, y ₂), (x ₄, y ₂) by the walsh sign indicating number demodulation reference mark of layer 1 and layer 2 to be carried out CDM between two RE in same group multiplexing.

Same Fig. 2-1B has provided based on the 2-1A basis, the number of layers of using when system belong to set 3, the mapping method of the demodulation reference mark during 4}, the value of x and y is respectively at this moment:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3,x_4\}=\left\{\mathrm{5,6,11,12}\right\}\\ y=\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,y_4\}=\left\{\mathrm{3,4,9,10}\right\}\end{array}\right.$

Corresponding Packet Multiplexing mode is, the RE of mapping DMRS is divided into 4 groups in the following manner, and to by the walsh sign indicating number each layer being carried out code division multiplexing between four RE in same group.

Group 1:{ (x ₁, y ₁), (x ₂, y ₁), (x ₁, y ₂), (x ₂, y ₂),

Group 2:{ (x ₃, y ₁), (x ₄, y ₁), (x ₃, y ₂), (x ₄, y ₂),

Group 3:{ (x ₁, y ₃), (x ₂, y ₃), (x ₁, y ₄), (x ₂, y ₄),

Group 4:{ (x ₃, y ₃), (x ₄, y ₃), (x ₃, y ₄), (x ₄, y ₄),

When considering that layer only is used for the low speed scene greater than 2 the time, carry out the multiplexing RE group technology of CDM and also can divide into groups according to following mode:

Group 1:{ (x ₁, y ₁), (x ₂, y ₁), (x ₃, y ₁), (x ₄, y ₁),

Group 2:{ (x ₁, y ₂), (x ₂, y ₂), (x ₃, y ₂), (x ₄, y ₂),

Group 3:{ (x ₁, y ₃), (x ₂, y ₃), (x ₃, y ₃), (x ₄, y ₃),

Group 4:{ (x ₁, y ₄), (x ₂, y ₄), (x ₃, y ₄), (x ₄, y ₄),

The number of layers of using when system belongs to set { 5,6,7, during 8}, shown in Fig. 2-1C, this moment, all RE were divided into 2 groups based on the mapping mode of 2-1A and 2-1B, be that 8 walsh sign indicating number carries out code division multiplexing by length between eight RE in same group, the RE of 2 groups of correspondences is respectively:

Group 1:{ (x ₁, y ₁), (x ₂, y ₁), (x ₃, y ₁), (x ₄, y ₁), (x ₁, y ₂), (x ₂, y ₂), (x ₃, y ₂), (x ₄, y ₂);

Group 2:{ (x ₁, y ₃), (x ₂, y ₃), (x ₃, y ₃), (x ₄, y ₃), (x ₁, y ₄), (x ₂, y ₄), (x ₃, y ₄), (x ₄, y ₄);

In the present embodiment, several mapped modes that Fig. 2-1 provides are based on and can carry out between the adjacent R B that combined channel estimates to design, and are similar to Example 1 if do not need to carry out combined channel when estimating, can make frequency domain position be positioned at the edge of RB as far as possible.Number of layers was smaller or equal to 2 o'clock at this moment, and the value of y can be modified to: y ∈ { y ₁, y ₂}={ 1,11}; Number of layers is greater than 2 o'clock, x, and the value of y can be modified to y ∈ { y ₁, y ₂}={ 1,2,11,12}.

The transmitting-receiving of considering relay is switched, the value of x can be modified to x ∈ 5,6,9,11}.

Specific embodiment 3:

Based on described method of the present invention, under a kind of extended cyclic prefix situation, add in the mapping mode of time-division multiplexing (FDM+TDM) the RE position (x that demodulation reference mark is shared based on frequency division multiplexing, y) can be expressed as in number of layers smaller or equal to 2 o'clock, the RE position that takies is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

When number of layers greater than 2 the time, the position of the RE that takies is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3,x_4\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

Based on above-mentioned resource unit allocation group, a kind of concrete multiplexing demodulation reference mark mapping mode based on FDM and/or TDM is shown in Fig. 3-1.

In this specific embodiment, when number of layers smaller or equal to 2 the time, the Resource Unit position that each layer takies is shown in Fig. 3-1A.When number of layers is that { 3, the Resource Unit position that 4}, each layer take is shown in Fig. 3-1B, and { 5,6,7, during 8}, the Resource Unit position that each layer takies is shown in Fig. 3-1C when number of layers belongs to.Concrete, when number of layers smaller or equal to 2 the time, the RE position that takies is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

The Resource Unit that each layer takies is respectively:

Layer 1:{ (x ₁, y ₁), (x ₁, y ₃), (x ₁, y ₅), (x ₂, y ₁), (x ₂, y ₃), (x ₂, y ₅)

Layer 2:{ (x ₁, y ₂), (x ₁, y ₄), (x ₁, y ₆), (x ₂, y ₂), (x ₂, y ₄), (x ₂, y ₆)

When number of layers belong to 3, during 4}, the RE position that takies is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3,x_4\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

Concrete, the Resource Unit that each layer takies is respectively:

Layer 1:{ (x ₁, y ₁), (x ₁, y ₃), (x ₁, y ₅), (x ₄, y ₁), (x ₄, y ₃), (x ₄, y ₅)

Layer 2:{ (x ₁, y ₂), (x ₁, y ₄), (x ₁, y ₆), (x ₄, y ₂), (x ₄, y ₄), (x ₄, y ₆)

Layer 3:{ (x ₂, y ₁), (x ₂, y ₃), (x ₂, y ₅), (x ₃, y ₁), (x ₃, y ₃), (x ₃, y ₅)

Layer 4:{ (x ₂, y ₂), (x ₂, y ₄), (x ₂, y ₆), (x ₃, y ₂), (x ₃, y ₄), (x ₃, y ₆)

When number of layers belong to 5,6,7, during 8}, the RE position that takies is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3,x_4\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

Concrete, the Resource Unit that each layer takies is respectively:

Layer 1:{ (x ₁, y ₁), (x ₁, y ₃), (x ₁, y ₅)

Layer 2:{ (x ₁, y ₂), (x ₁, y ₄), (x ₁, y ₆)

Layer 3:{ (x ₂, y ₁), (x ₂, y ₃), (x ₂, y ₅)

Layer 4:{ (x ₂, y ₂), (x ₂, y ₄), (x ₂, y ₆)

Layer 5:{ (x ₄, y ₁), (x ₄, y ₃), (x ₄, y ₅)

Layer 6:{ (x ₄, y ₂), (x ₄, y ₄), (x ₄, y ₆)

Layer 7:{ (x ₃, y ₁), (x ₃, y ₃), (x ₃, y ₅)

Layer 8:{ (x ₃, y ₂), (x ₃, y ₄), (x ₃, y ₆)

Need to prove, corresponding above-mentioned mapping mode, the number of layers of using when reality is during less than the maximum number of layers of the support of current layer number order class, the transmission that layer can be used for PDSCH (physical Downlink share channe) data that not have to use.For example when the actual number of layers of using is 5, its belong to 5,6,7, the situation of 8}, this moment is the demodulation reference mark of mapping layer 1～5 correspondence only, and the RE that is used for mapping layer 6～7 corresponding demodulation reference mark is used to carry out the transmission of PDSCH data; Perhaps, still keep the demodulation reference mark of all layers of mapping correspondence, be used for estimation disturbing when the actual number of layers of using during less than the maximum number of layers of the support of current layer number order class.For example, for example when the actual number of layers of using is 5, its belong to 5,6,7, the situation of 8}, this moment still according to number of layers the situation when maximum carry out the mapping of demodulation reference mark, i.e. the demodulation reference mark of mapping layer 1～8 all layers correspondence.

Similar to Example 1 equally, estimate in order to allow to carry out combined channel between the adjacent Resource Block, can the position of frequency domain be modified to:

y∈{y ₁，y ₂，y ₃，y ₄，y ₅，y ₆}＝{2，3，6，7，10，11}

When last OFDM symbol is used for other purposes, for example during the switching of relay, the time domain value can be done following to revise: number of layers was modified to x ∈ { x smaller or equal to 2 o'clock ₁, x ₂}={ 5,11}; Number of layers is greater than 2 o'clock, x ∈ { x ₁, x ₂, x ₃, x ₄}={ 5,6,9,11}.

In the mode of Miao Shuing, the shared OFDM number of symbols of demodulation reference mark is 4 to the maximum in the above.Demodulation reference mark number based on FDM and/or TDM can also be 2.Provide the shared OFDM symbolic number of a kind of demodulation reference mark below and be the mapping mode under 2 the situation, this moment, one group of corresponding RE position was expressed as, when number of layers smaller or equal to 2 the time, the position that is used to represent one group of RE for (as Fig. 3-2A):

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,5,6,9,10}\right\}\end{array}\right.$

When number of layers greater than 2 the time, corresponding RE position be (as Fig. 3-2B):

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,{\mathrm{<figure-callout\; id="6"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_6,{\mathrm{<figure-callout\; id="7"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_7,{\mathrm{<figure-callout\; id="8"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_8,{\mathrm{<figure-callout\; id="9"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_9,{\mathrm{<figure-callout\; id="10"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_{10},{\mathrm{<figure-callout\; id="11"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_{11},y_{12}\}=\left\{\mathrm{1,2,3,4,5,6,7,8,9,10,11,12}\right\}\end{array}\right.$

Under this mode, when number of layers smaller or equal to 2 the time, except y value difference, it is identical that packet mode is described in the Resource Unit packet mode and the front of each layer., then made amendment greater than 2 o'clock in number of layers, make demodulation reference mark only take 2 OFDM symbols, and increase the position of frequency domain, a kind of packet mode of each layer Resource Unit specifically is, shown in Fig. 3-2B:

When number of layers belong to set 3, during 4}, the resource unit group of each layer correspondence is:

Layer 1:{ (x ₁, y ₁), (x ₁, y ₅), (x ₁, y ₉), (x ₂, y ₁), (x ₂, y ₅), (x ₂, y ₉)

Layer 2:{ (x ₁, y ₂), (x ₁, y ₆), (x ₁, y ₁₀), (x ₂, y ₂), (x ₂, y ₆), (x ₂, y ₁₀)

Layer 3:{ (x ₁, y ₃), (x ₁, y ₇), (x ₁, y ₁₁), (x ₂, y ₃), (x ₂, y ₇), (x ₂, y ₁₁)

Layer 4:{ (x ₁, y ₄), (x ₁, y ₈), (x ₁, y ₁₂), (x ₂, y ₄), (x ₂, y ₈), (x ₂, y ₁₂)

When number of layers belong to set 5,6,7, during 8}, the resource unit group of each layer correspondence:

Layer 1:{ (x ₁, y ₁), (x ₁, y ₅), (x ₁, y ₉), (x ₂, y ₁)

Layer 2:{ (x ₁, y ₂), (x ₁, y ₆), (x ₁, y ₁₀)

Layer 3:{ (x ₁, y ₃), (x ₁, y ₇), (x ₁, y ₁₁)

Layer 4:{ (x ₁, y ₄), (x ₁, y ₈), (x ₁, y ₁₂)

Layer 5:{ (x ₂, y ₁), (x ₂, y ₅), (x ₂, y ₉)

Layer 6:{ (x ₂, y ₂), (x ₂, y ₆), (x ₂, y ₁₀)

Layer 7:{ (x ₂, y ₃), (x ₂, y ₇), (x ₂, y ₁₁)

Layer 8:{ (x ₂, y ₄), (x ₂, y ₈), (x ₂, y ₁₂)

When last OFDM symbol is used for other purposes, for example during the switching of relay, the time domain value can be modified to: x ∈ { x ₁, x ₂}={ 5,11}.

Specific embodiment 4:

In the present embodiment, provided under the extended cyclic prefix situation, when number of layers be 1 or number of layers take 8 RE when being 2, and number of layers took the demodulation reference mark mapping method of 16 RE greater than 2 o'clock.

Based on above-mentioned expense, when number of layers smaller or equal to 2 the time, one group of shared Resource Unit of demodulation reference mark is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{3,4,9,10}\right\}\end{array}\right.$

When number of layers belong to 5,6,7, during 8}, one group of Resource Unit Resource Unit that each layer demodulation reference mark is shared be:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{3,4,9,10}\right\}\end{array}\right.$

Fig. 4-1 has provided the resource unit allocation method that a kind of each concrete layer takies, when number of layers smaller or equal to 2 the time, the Resource Unit position that each layer takies is shown in Fig. 4-1A.{ 3, during 4}, the Resource Unit position that each layer takies is shown in Fig. 4-1B, and { 5,6,7, during 8}, the Resource Unit position that each layer takies is shown in Fig. 4-1C when number of layers belongs to when number of layers belongs to set.Concrete, when number of layers smaller or equal to 2 the time,

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{3,4,9,10}\right\}\end{array}\right.$

In the Resource Unit of expression, the Resource Unit that each layer takies is respectively:

Layer 1:{ (x ₁, y ₁), (x ₁, y ₃), (x ₂, y ₁), (x ₂, y ₃}

Layer 2:{ (x ₁, y ₂), (x ₁, y ₄), (x ₂, y ₂), (x ₂, y ₄)

When number of layers belong to 3, during 4},

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{3,4,9,10}\right\}\end{array}\right.$

In the Resource Unit of expression, the Resource Unit that each layer takies is respectively:

Layer 1:{ (x ₁, y ₁), (x ₁, y ₃), (x ₄, y ₁), (x ₄, y ₃)

Layer 2:{ (x ₁, y ₂), (x ₁, y ₄), (x ₄, y ₂), (x ₄, y ₄)

Layer 3:{ (x ₂, y ₁), (x ₂, y ₃), (x ₃, y ₁), (x ₃, y ₃)

Layer 4:{ (x ₂, y ₂), (x ₂, y ₄), (x ₃, y ₂), (x ₃, y ₄)

When number of layers belong to 5,6,7, during 8},

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\{5,\mathrm{6,11,12}\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{3,4,9,10}\right\}\end{array}\right.$

In the Resource Unit of expression, the Resource Unit that each layer takies is respectively:

Layer 1:{ (x ₁, y ₁), (x ₁, y ₃)

Layer 2:{ (x ₁, y ₂), (x ₁, y ₄)

Layer 3:{ (x ₂, y ₁), (x ₂, y ₃)

Layer 4:{ (x ₂, y ₂), (x ₂, y ₄)

Layer 5:{ (x ₄, y ₁), (x ₄, y ₃)

Layer 6:{ (x ₄, y ₂), (x ₄, y ₄)

Layer 7:{ (x ₃, y ₁), (x ₃, y ₃)

Layer 8:{ (x ₃, y ₂), (x ₃, y ₄)

Similar to Example 1 equally, when last OFDM symbol is used for other purposes, for example during the switching of relay, the time domain value can be modified to: x ∈ { x ₁, x ₂, x ₃, x ₄}={ 5,6,9,11}.

In the mode of Miao Shuing, the shared OFDM number of symbols of demodulation reference mark is 4 to the maximum in the above.Demodulation reference mark number based on FDM and/or TDM can also be 2.Provide the shared OFDM symbolic number of a kind of demodulation reference mark below and be the mapping mode under 2 the situation, this moment, one group of corresponding RE position was expressed as, when number of layers smaller or equal to 2 the time, be used to represent that the position of one group of RE is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,y_4\}=\left\{\mathrm{3,4,9,10}\right\}\end{array}\right.$

When number of layers greater than 2 the time, corresponding RE position is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,{\mathrm{<figure-callout\; id="6"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_6,{\mathrm{<figure-callout\; id="7"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_7,y_8\}=\left\{\mathrm{2,3,4,5,6,7,8,9,10,11}\right\}\end{array}\right.$

Under this mode, when number of layers smaller or equal to 2 the time, it is identical shown in Fig. 4-2A that packet mode is described in the Resource Unit packet mode and the front of each layer.Greater than 2 o'clock, the respective layer number belonged to that { 3,4} and number of layers belong to that { 5,6,7, the packet mode of 8} concrete each layer Resource Unit is shown in Fig. 4-2B and Fig. 4-2C in number of layers.

When number of layers belong to set 3, during 4}, the resource unit group of each layer correspondence is:

Layer 1:{ (x ₁, y ₂), (x ₁, y ₆), (x ₂, y ₂), (x ₂, y ₆)

Layer 2:{ (x ₁, y ₃), (x ₁, y ₇), (x ₂, y ₇), (x ₂, y ₇)

Layer 3:{ (x ₁, y ₁), (x ₁, y ₅), (x ₂, y ₁), (x ₂, y ₅)

Layer 4:{ (x ₁, y ₄), (x ₁, y ₈), (x ₂, y ₄), (x ₂, y ₈)

When number of layers belong to set 5,6,7, during 8}, the resource unit group of each layer correspondence:

Layer 1:{ (x ₁, y ₂), (x ₁, y ₆)

Layer 2:{ (x ₁, y ₃), (x ₁, y ₄)

Layer 3:{ (x ₁, y ₁), (x ₁, y ₅)

Layer 4:{ (x ₁, y ₄), (x ₁, y ₈)

Layer 5:{ (x ₂, y ₂), (x ₂, y ₆)

Layer 6:{ (x ₂, y ₄), (x ₂, y ₇)

Layer 7:{ (x ₂, y ₁), (x ₂, y ₅)

Layer 8:{ (x ₂, y ₄), (x ₂, y ₈)

When last OFDM symbol is used for other purposes, for example during the switching of relay, the time domain value can be modified to x ∈ { x ₁, x ₂}={ 5,11}.

Specific embodiment 5:

A kind of execution mode based on FDM and/or TDM and CDM hybrid multiplex in the hybrid multiplex design of this embodiment, is multiplexed with main multiplex mode with FDM and/or TDM, is auxiliary multiplex mode with CDM.

When the maximum number of layers of system's support is 8, each layer can be divided into two groups, every group comprises 4 layers; It is multiplexing that each layer in every group adopts the mode of FDM to carry out, and adopts the mode of CDM to carry out multiplexing between the group.The mode of grouping can be following several modes:

Mode 1: $\left\{\begin{array}{c}\mathrm{<figure-callout\; id="1"\; label="Group"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">Group</figure-callout>}1=\{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^1,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">l</figure-callout>}}_2^1,{\mathrm{<figure-callout\; id="3"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_3^1,{\mathrm{<figure-callout\; id="4"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_4^1\}=\left\{\mathrm{1,3,5,7}\right\}\\ \mathrm{<figure-callout\; id="2"\; label="Group"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">Group</figure-callout>}2=\{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^2,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">l</figure-callout>}}_2^2,{\mathrm{<figure-callout\; id="3"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_3^2,{\mathrm{<figure-callout\; id="4"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_4^2\}=\left\{\mathrm{2,4,6,8}\right\}\end{array}\right.$

The layer that index between two groups is identical carries out code division multiplexing; Wherein

Represent i pairing actual layer sequence number in the j group, Group represents group, down together.

Mode 2: $\left\{\begin{array}{c}\mathrm{<figure-callout\; id="1"\; label="Group"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">Group</figure-callout>}1=\{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^1,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">l</figure-callout>}}_2^1,{\mathrm{<figure-callout\; id="3"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_3^1,{\mathrm{<figure-callout\; id="4"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_4^1\}=\{1,\mathrm{2,3,4}\}\\ \mathrm{<figure-callout\; id="2"\; label="Group"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">Group</figure-callout>}2=\{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^2,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">l</figure-callout>}}_2^2,{\mathrm{<figure-callout\; id="3"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_3^2,{\mathrm{<figure-callout\; id="4"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_4^2\}=\left\{\mathrm{5,6,7,8}\right\}\end{array}\right.$

The layer that index between two groups is identical carries out code division multiplexing;

Mode 3: $\left\{\begin{array}{c}\mathrm{<figure-callout\; id="1"\; label="Group"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">Group</figure-callout>}1=\{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^1,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">l</figure-callout>}}_2^1,{\mathrm{<figure-callout\; id="3"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_3^1,{\mathrm{<figure-callout\; id="4"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_4^1\}=\{1,2,\mathrm{5,6}\}\\ \mathrm{<figure-callout\; id="2"\; label="Group"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">Group</figure-callout>}2=\{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^2,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">l</figure-callout>}}_2^2,{\mathrm{<figure-callout\; id="3"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_3^2,{\mathrm{<figure-callout\; id="4"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_4^2\}=\{3,\mathrm{4,7,8}\}\end{array}\right.$

The layer that index between two groups is identical carries out code division multiplexing;

Fig. 5-1 has provided a kind of concrete mapping method based on this thought.In the drawings, the mode of grouping adopts mode 2, and shown in Fig. 5-1C, { 1,2,3, the 4} layer belongs to group 1, and { 5,6,7, the 8} layer belongs to group 2.

When number of layers equals 2, used 12 RE altogether, time-domain position x that takies and the value of frequency domain position y are respectively:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

When number of layers greater than 2 the time, time-domain position x that takies and the value of frequency domain position y are respectively:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

Wherein number of layers was smaller or equal to 4 o'clock, adopt the multiplex mode of time-division/frequency division to carry out multiplexing between each layer, when number of layers greater than 4 the time, the layer that the layer that increases newly is identical with index i in the group 1 carries out code division multiplexing, in this mode, promptly layer 5 is multiplexing with layer 1, and layer 6 is multiplexing with layer 2, layer 7 is multiplexing with layer 3, and layer 8 is multiplexing with layer 4.In addition, the mapping Resource Unit position of the less situation of number of layers (smaller or equal to 2 o'clock) is the subclass that the more situation of number of layers (greater than 2 o'clock, equaling 4 as number of layers) takies Resource Unit.

In the pattern of this embodiment correspondence, owing to do not carry out code division multiplexing between on the same group, so the Resource Unit position that the layer of code division multiplexing takies is identical, the Resource Unit position that each group takies is closed and is:

Number of layers was smaller or equal to 2 o'clock (shown in Fig. 5-1A):

Layer: { (x ₁, y ₁), (x ₁, y ₃), (x ₁, y ₅), (x ₂, y ₁), (x ₂, y ₃), (x ₂, y ₅)

Layer: { (x ₁, y ₂), (x ₁, y ₄), (x ₁, y ₆), (x ₂, y ₁), (x ₂, y ₄), (x ₂, y ₆)

When number of layers belong to set 3, during 4} (shown in Fig. 5-1B):

Layer: { (x ₁, y ₁), (x ₁, y ₃), (x ₁, y ₅), (x ₄, y ₁), (x ₄, y ₃), (x ₄, y ₅)

Layer: { (x ₁, y ₂), (x ₁, y ₄), (x ₁, y ₆), (x ₄, y ₁), (x ₄, y ₄), (x ₂, y ₆)

Layer: { (x ₂, y ₁), (x ₂, y ₃), (x ₂, y ₅), (x ₃, y ₁), (x ₃, y ₃), (x ₃, y ₅)

Layer: { (x ₂, y ₂), (x ₂, y ₄), (x ₂, y ₆), (x ₃, y ₁), (x ₃, y ₄), (x ₃, y ₆)

When number of layers belong to 5,6,7, during 8}, the layer that carries out code division multiplexing takies same position i.e. (shown in Fig. 5-1C):

The layer and

Layer: { (x ₁, y ₁), (x ₁, y ₃), (x ₁, y ₅), (x ₄, y ₁), (x ₄, y ₃), (x ₄, y ₅)

The layer and

Layer: { (x ₁, y ₂), (x ₁, y ₄), (x ₁, y ₆), (x ₄, y ₁), (x ₄, y ₄), (x ₂, y ₆)

The layer and

Layer: { (x ₂, y ₁), (x ₂, y ₃), (x ₂, y ₅), (x ₃, y ₁), (x ₃, y ₃), (x ₃, y ₅)

The layer and

Layer: { (x ₂, y ₂), (x ₂, y ₄), (x ₂, y ₆), (x ₃, y ₁), (x ₃, y ₄), (x ₃, y ₆)

Similar to Example 1 equally, when last OFDM symbol is used for other purposes, for example during the switching of relay, the time domain value can be modified to: number of layers is smaller or equal to 2, x ∈ { x ₁, x ₂}={ 5,11}; The layer greater than 2 o'clock, x ∈ { x ₁, x ₂, x ₃, x ₄}={ 5,6,9,11}.If when considering to carry out between the adjacent RB combined channel estimation, can be modified to frequency domain position: y ∈ { y ₁, y ₂, y ₃, y ₄, y ₅, y ₆}={ 2,3,6,7,10,11}.

In the execution mode that provides in the above, the expense design considerations that the design of the pilot tone pattern of demodulation reference mark is is: number of layers was smaller or equal to 2 o'clock, and expense is 12RE/RB, and number of layers was greater than 2 o'clock, and expense is 24RE/RB; Consider under the expansion CP that can be used to transmit the RE negligible amounts of data, expense can be set according to being: number of layers was smaller or equal to 2 o'clock, and expense is 8RE/RB, and number of layers was greater than 2 o'clock, and expense is 16RE/RB.The design philosophy of this moment is similar to above-described mode, only need smaller or equal to 2 o'clock, remove two value values of the centre in the frequency domain set in number of layers on above-mentioned basis, and corresponding sets of resource units is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,y_4\}=\left\{\mathrm{1,2,11,12}\right\}\end{array}\right.$

When number of layers greater than 2 the time, corresponding sets of resource units is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\{5,\mathrm{6,11,12}\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,y_4\}=\{\mathrm{1,2},\mathrm{11,12}\}\end{array}\right.$

The Resource Unit position relation that each group takies is as follows:

When number of layers smaller or equal to 2 the time:

{(x ₁，y ₁)，(x ₁，y ₃)，(x ₂，y ₁)，(x ₂，y ₃)}

{(x ₁，y ₂)，(x ₁，y ₄)，(x ₂，y ₁)，(x ₂，y ₄)}

When number of layers greater than 2 the time, this moment, the layer of code division multiplexing took same position:

With

{ (x ₁, y ₁), (x ₁, y ₃), (x ₄, y ₁), (x ₄, y ₃)

With

{ (x ₁, y ₂), (x ₁, y ₄), (x ₄, y ₁), (x ₄, y ₄)

With

{ (x ₂, y ₁), (x ₂, y ₃), (x ₃, y ₁), (x ₃, y ₃)

With

{ (x ₂, y ₂), (x ₂, y ₄), (x ₃, y ₁), (x ₃, y ₄)

Corresponding be used for other purposes when last OFDM symbol, for example during the switching of relay, the time domain value can be modified to: number of layers is smaller or equal to 2, x ∈ { x ₁, x ₂}={ 5,11}; The layer greater than 2 o'clock, x ∈ { x ₁, x ₂, x ₃, x ₄}={ 5,6,9,11}.If when considering to carry out between the adjacent RB combined channel estimation, can be modified to y ∈ { y to frequency domain position ₁, y ₂, y ₃, y ₄}={ 2,3,10,11}.

Specific embodiment 6:

With code division multiplexing is main multiplex mode, and frequency division multiplexing and/or time division multiplexing are the hybrid multiplex method of auxiliary multiplex mode.In this mode, at first the mode based on code division multiplexing is that the pilot patterns sample is set under the low-rank situation, and expands to the situation of high order based on the mode of frequency division multiplexing and/or code division multiplexing.

When the maximum number of layers of system's support was 8, based on this method, at first number of layers was smaller or equal to 2 o'clock, and the mode of employing code division multiplexing is carried out multiplexing to layer 1 and layer 2, and the Resource Unit expense is 12RE/RB simultaneously; When number of layers greater than 2 the time, the multiplex mode that adopts code division multiplexing to mix with frequency division and/or time-division carries out multiplexing, while Resource Unit expense is 24RE/RB.

When adopting frequency division multiplexing with frequency division multiplexing and/or time division multiplexing hybrid multiplex, can divide into groups to different layers, adopt the multiplex mode of frequency division multiplexing in same group, not on the same group between the multiplex mode of employing time-division and/or frequency division.Packet mode comprises following several mode:

Mode 1: $\left\{\begin{array}{c}\mathrm{<figure-callout\; id="1"\; label="Group"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">Group</figure-callout>}1=\{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^1,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">l</figure-callout>}}_2^1,{\mathrm{<figure-callout\; id="3"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_3^1,{\mathrm{<figure-callout\; id="4"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_4^1\}=\left\{\mathrm{1,2,5,7}\right\}\\ \mathrm{<figure-callout\; id="2"\; label="Group"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">Group</figure-callout>}2=\{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^2,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">l</figure-callout>}}_2^2,{\mathrm{<figure-callout\; id="3"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_3^2,{\mathrm{<figure-callout\; id="4"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_4^2\}=\left\{\mathrm{3,4,6,8}\right\}\end{array}\right.$

Mode 2: $\left\{\begin{array}{c}\mathrm{<figure-callout\; id="1"\; label="Group"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">Group</figure-callout>}1=\{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^1,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">l</figure-callout>}}_2^1,{\mathrm{<figure-callout\; id="3"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_3^1,{\mathrm{<figure-callout\; id="4"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_4^1\}=\{1,\mathrm{2,5,6}\}\\ \mathrm{<figure-callout\; id="2"\; label="Group"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">Group</figure-callout>}2=\{{\mathrm{<figure-callout\; id="1"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_1^2,{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">l</figure-callout>}}_2^2,{\mathrm{<figure-callout\; id="3"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_3^2,{\mathrm{<figure-callout\; id="4"\; label="l"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">l</figure-callout>}}_4^2\}=\left\{\mathrm{3,4,7,8}\right\}\end{array}\right.$

Fig. 6-1 has provided a kind of concrete mapping method based on this thought.In the drawings, the mode of grouping is an example in mode 1, and promptly { 1,2,5, the 7} layer belongs to group 1, and { 3,4,6, the 8} layer belongs to group 2.

When number of layers smaller or equal to 2 the time, it is that 2 code word is carried out multiplexing that layer 1 and layer 2 adopt code lengths; When number of layers is 3 or 4, on the basis of layer 1 and layer 2,, be layer 3 and other 12 RE of layer 4 distribution by the mode of frequency division multiplexing, layer 3 and layer 4 carry out code division multiplexing, and the code length of code division multiplexing still is 2.When number of layers greater than 4 the time, adopting code length is that 4 code word is carried out code division multiplexing, wherein each layer among the Groupl carries out code division multiplexing, each among the Group2 layer carried out code division multiplexing, layer carries out code division multiplexing by time-division and/or frequency division between Groupl and the Group2.When the different layers number, the resource unit group of each layer correspondence is respectively:

Number of layers is 1 or 2 o'clock, layer

With

Carry out code division multiplexing, and take identical resource unit group (as Fig. 6-1A):

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,6,11}\right\}\end{array}\right.$

The Resource Unit position relation that each group takies is as follows:

With

{ (x ₁, y ₁), (x ₁, y ₂), (x ₁, y ₃), (x ₂, y ₁), (x ₂, y ₂), (x ₂, y ₃), (x ₃, y ₁), (x ₃, y ₂), (x ₃, y ₃), (x ₄, y ₁), (x ₄, y ₂), (x ₃, y ₃), code length is 2, same time slot, and the RE on two OFDM symbols of same frequency domain position carries out multiplexing, and at this moment, mapping mode is with among the embodiment 1, and the mapping mode when number of layers is 1 or 2 is identical.

When number of layers is 3 or 4, layer

With

Carry out code division multiplexing, and take identical resource unit group; Layer

With

Carry out code division multiplexing, and take identical resource unit group.Layer is 4 o'clock, the corresponding sets of resource units of all layers be (as Fig. 6-1B):

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

The Resource Unit position relation that each group takies is as follows:

With

The resource unit group that layer is corresponding is: { (x ₁, y ₁), (x ₁, y ₃), (x ₁, y ₅), (x ₂, y ₁), (x ₂, y ₃), (x ₂, y ₅), (x ₃, y ₁), (x ₃, y ₃), (x ₃, y ₅), (x ₄, y ₁), (x ₄, y ₃), (x ₄, y ₅), code length is 2, same time slot, and the RE on two OFDM symbols of same sub-carrier positions carries out multiplexing, concrete, the RE that shines upon DMRS is divided into 6 groups: { (x ₁, y ₁), (x ₂, y ₁), { (x ₃, y ₁), (x ₄, y ₁), { (x ₁, y ₃), (x ₂, y ₃), { (x ₃, y ₃), (x ₄, y ₃), { (x ₁, y ₅), (x ₂, y ₅), { (x ₃, y ₅), (x ₄, y ₅), pass through the walsh sign indicating number to layer between same group of two interior RE

And layer

Demodulation reference mark to carry out CDM multiplexing.

With

Corresponding resource unit group is: { (x ₁, y ₂), (x ₁, y ₄), (x ₁, y ₆), (x ₂, y ₂), (x ₂, y ₄), (x ₂, y ₆), (x ₃, y ₂), (x ₃, y ₄), (x ₃, y ₆), (x ₄, y ₂), (x ₄, y ₄), (x ₄, y ₆), code length is 2, same time slot, and the RE on two OFDM symbols of same sub-carrier positions carries out multiplexing, concrete, and the DMRS RE that this group is shone upon is divided into 6 groups: { (x ₁, y ₂), (x ₂, y ₂), { (x ₃, y ₂), (x ₄, y ₂), { (x ₁, y ₄), (x ₂, y ₄), { (x ₃, y ₄), (x ₄, y ₄), { (x ₁, y ₆), (x ₂, y ₆), { (x ₃, y ₆), (x ₄, y ₆), pass through the walsh sign indicating number to layer between same group of two interior RE And layer

Demodulation reference mark to carry out CDM multiplexing.

When number of layers is greater than 4 the time, layer

Carry out code division multiplexing, and take identical resource unit group; Layer Carry out code division multiplexing, and take identical resource unit group, the resource unit group that takies and layer equal 4 o'clock identical (as Fig. 6-1C).

{ (x ₁, y ₁), (x ₁, y ₃), (x ₁, y ₅), (x ₂, y ₁), (x ₂, y ₃), (x ₂, y ₅), (x ₃, y ₁), (x ₃, y ₃), (x ₃, y ₅), (x ₄, y ₁), (x ₄, y ₃), (x ₃, y ₅), code length is in 4, one RB, same sub-carrier positions, and 4 RE on the different OFDM symbols carry out code division multiplexing.Concrete, the DMRS RE that this group is shone upon is divided into 3 groups: { (x ₁, y ₁), (x ₂, y ₁), (x ₃, y ₁), (x ₄, y ₁), { (x ₁, y ₃), (x ₂, y ₃), (x ₃, y ₃), (x ₄, y ₃), { (x ₁, y ₅), (x ₂, y ₅), (x ₃, y ₅), (x ₄, y ₅), pass through the walsh sign indicating number to layer between same group of 4 interior RE

Demodulation reference mark carry out code division multiplexing.

{ (x ₁, y ₂), (x ₁, y ₄), (x ₁, y ₆), (x ₂, y ₂), (x ₂, y ₄), (x ₂, y ₆), (x ₃, y ₂), (x ₃, y ₄), (x ₃, y ₆), (x ₄, y ₂), (x ₄, y ₄), (x ₃, y ₆), code length is in 4, one RB, same sub-carrier positions, and 4 RE on the different OFDM symbols carry out code division multiplexing.Concrete, the DMRS RE that this group is shone upon is divided into 3 groups: { (x ₁, y ₂), (x ₂, y ₂), (x ₃, y ₂), (x ₄, y ₂), { (x ₁, y ₄), (x ₂, y ₄), (x ₃, y ₄), (x ₄, y ₄), { (x ₁, y ₆), (x ₂, y ₆), (x ₃, y ₆), (x ₄, y ₆), pass through the walsh sign indicating number to layer between same group of 4 interior RE Demodulation reference mark carry out code division multiplexing.

Similar with embodiment 1, when last OFDM symbol is used for other purposes, for example during the switching of relay, the time domain value can be modified to: x ∈ { x ₁, x ₂, x ₃, x ₄}={ 5,6,9,11}.If consider can carry out between the adjacent RB combined channel when estimating, can revise frequency domain position, number of layers is smaller or equal to being modified to y ∈ { y at 2 o'clock ₁, y ₂, y ₃}={ 2,6,10}; Number of layers is greater than being modified to y ∈ { y at 2 o'clock ₁, y ₂, y ₃, y ₄, y ₅, y ₆}={ 2,3,6,7,10,11}.

When number of layers smaller or equal to 2 the time, expense adopts 8RE/RB, number of layers was greater than 2 o'clock, expense adopts 16RE/RB.The design philosophy of this moment is similar to above-described mode, only need smaller or equal to 2 o'clock, remove two value values of the centre in the frequency domain set in number of layers on above-mentioned basis, and corresponding sets of resource units is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,y_4\}=\left\{\mathrm{3,9}\right\}\end{array}\right.$

When number of layers greater than 2 the time, corresponding sets of resource units is:

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2\}=\left\{\mathrm{5,6,11,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,y_4\}=\left\{\mathrm{3,4,9,10}\right\}\end{array}\right..$

The Resource Unit position that each group takies is closed and is:

Number of layers was smaller or equal to 2 o'clock:

With { (x ₁, y ₁), (x ₁, y ₂), (x ₂, y ₁), (x ₂, y ₂), (x ₃, y ₁), (x ₃, y ₂), (x ₄, y ₁), (x ₄, y ₂), code length is 2, same time slot, and the RE on two OFDM symbols of same frequency domain position carries out multiplexing.

Number of layers is 3 or 4 o'clock:

With { (x ₁, y ₁), (x ₁, y ₃), (x ₂, y ₁), (x ₂, y ₃), (x ₃, y ₁), (x ₃, y ₃), (x ₄, y ₁), (x ₄, y ₃), code length is 2, same time slot, and the RE on two OFDM symbols of same sub-carrier positions carries out multiplexing.

With

{ (x ₁, y ₂), (x ₁, y ₄), (x ₂, y ₂), (x ₂, y ₄), (x ₃, y ₂), (x ₃, y ₄), (x ₄, y ₂), (x ₄, y ₄), code length is 2,, same time slot, the RE on two OFDM symbols of same sub-carrier positions carries out multiplexing.

Number of layers was greater than 4 o'clock:

{ (x ₁, y ₁), (x ₁, y ₃), (x ₂, y ₁), (x ₂, y ₃), (x ₃, y ₁), (x ₃, y ₃), (x ₄, y ₁), (x ₄, y ₃), code length is in 4, one RB, same sub-carrier positions, and 4 RE on the different OFDM symbols carry out code division multiplexing.

{ (x ₁, y ₂), (x ₁, y ₄), (x ₂, y ₂), (x ₂, y ₄), (x ₃, y ₂), (x ₃, y ₄), (x ₄, y ₂), (x ₄, y ₄), code length is in 4, one RB, same sub-carrier positions, and 4 RE on the different OFDM symbols carry out code division multiplexing.

Same, when last OFDM symbol is used for other purposes, for example during the switching of relay, the time domain value can be modified to: x ∈ { x ₁, x ₂, x ₃, x ₄}={ 5,6,9,11}.If do not consider to carry out between the adjacent RB combined channel when estimating, can revise frequency domain position, number of layers is smaller or equal to 2 o'clock, y ∈ { y ₁, y ₂, y ₃}={ 1,11}; Number of layers is greater than being modified to y ∈ { y at 2 o'clock ₁, y ₂, y ₃, y ₄, y ₅, y ₆}={ 1,2,11,12}.

Under the design based on CDM and FDM and/or TDM hybrid multiplex, have only an OFDM symbol to keep for the design of CSI-RS in the above.When being thought of as CSI-RS reservation OFDM symbol, can be based on the pattern of 3 OFDM symbols design DMRS.And the Resource Unit expense can be set to 10RE/RB and 18RE/RB respectively under low-rank (smaller or equal to 2 layers) and high order (greater than 2 layers) situation.

Corresponding, when number of layers smaller or equal to 2 the time, one group of RE of distribution can be expressed as (as Fig. 6-2A):

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3\}=\left\{\mathrm{5,9,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

That concrete is { (x ₁, y ₁), (x ₁, y ₂), (x ₁, y ₅), (x ₁, y ₆), (x ₂, y ₃), (x ₂, y ₄), (x ₃, y ₁), (x ₃, y ₂), (x ₃, y ₅), (x ₃, y ₆)

Corresponding, when number of layers is 3 or 4, one group of RE of distribution can be expressed as (as Fig. 6-2B):

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3\}=\left\{\mathrm{5,9,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

A kind of concrete method of salary distribution is:

Layer 1 and layer 2 Multiplexing Unit group: { (x ₁, y ₁), (x ₁, y ₂), (x ₁, y ₅), (x ₁, y ₆), (x ₂, y ₃), (x ₂, y ₄), (x ₃, y ₁), (x ₃, y ₂), (x ₃, y ₅), (x ₃, y ₆)

Layer 3 and layer 4 Multiplexing Unit group: { (x ₁, y ₃), (x ₁, y ₄), (x ₂, y ₁), (x ₂, y ₂), (x ₂, y ₅), (x ₂, y ₆), (x ₃, y ₃), (x ₃, y ₄)

When number of layers greater than 4 the time, one group of RE of distribution can be expressed as (as Fig. 6-2C):

$\left\{\begin{array}{c}x\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="x"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">x</figure-callout>}}_1,x_2,x_3\}=\left\{\mathrm{5,9,12}\right\}\\ y\&Element;\{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_1,{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_2,{\mathrm{<figure-callout\; id="3"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_3,{\mathrm{<figure-callout\; id="4"\; label="y"\; filenames="H2009102352907E0000012.png,H2009102352907E0000013.png"\; state="\{\{state\}\}">y</figure-callout>}}_4,{\mathrm{<figure-callout\; id="5"\; label="y"\; filenames="H2009102352907E0000011.png,H2009102352907E0000012.png"\; state="\{\{state\}\}">y</figure-callout>}}_5,y_6\}=\left\{\mathrm{1,2,6,7,11,12}\right\}\end{array}\right.$

A kind of concrete method of salary distribution is:

Layer 1,2,5,6 Multiplexing Unit group: { (x ₁, y ₁), (x ₁, y ₂), (x ₁, y ₅), (x ₁, y ₆), (x ₃, y ₁), (x ₃, y ₂), (x ₃, y ₅), (x ₃, y ₆)

Layer 3,4,7,8 Multiplexing Unit group: { (x ₁, y ₃), (x ₁, y ₄), (x ₃, y ₃), (x ₃, y ₄)

Have only layer 1,2 multiplexing position: { (x ₂, y ₃), (x ₂, y ₄)

Have only layer 3,4 multiplexing position: { (x ₂, y ₁), (x ₂, y ₂), (x ₂, y ₅), (x ₂, y ₆)

In this design for scheme, taken into full account the applied probability of different layers, promptly used the more little layer of probability, the RE density of distribution is low more.

Same, when last OFDM symbol is used for other purposes, for example during the switching of relay, the time domain value can be modified to: x ∈ { x ₁, x ₂, x ₃}={ 5,9,11}; If when considering to carry out between the adjacent RB combined channel estimation, can be modified to y ∈ { y to frequency domain position ₁, y ₂, y ₃}={ 2,6,10}.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (16)

1. the mapping method of demodulation reference mark in the extended cyclic prefix in the advanced long-term evolution system is characterized in that, comprising:

The time-domain position of demodulation reference mark of carrying advanced long-term evolution system is positioned on shared OFDM (OFDM) symbol of not Be Controlled channel, common reference symbol and witness mark symbol, and therefrom selects one or more OFDM symbols to be used to carry described demodulation reference mark;

Demodulation reference mark between a plurality of layers is divided by frequency division, time-division, sign indicating number or the mode of multiple multiplex mode mixing is carried out orthogonal multiplex.

2. method according to claim 1 is characterized in that, the compound mode of carrying the OFDM symbol of described demodulation reference mark is any one in the following three kinds of modes of employing:

A1, described demodulation reference mark maximum take 4 OFDM symbols, and be mapped on the the the 5th, the 6th, the 11st and the 12nd the OFDM symbol or the the the 5th, the 6th, the 9th and the 11st OFDM symbol on;

A2, described demodulation reference mark maximum take 2 OFDM symbols, and be mapped on the 5th and the 12nd the OFDM symbol or the 5th and the 11st OFDM symbol on;

A3, described demodulation reference mark maximum take 3 OFDM symbols, and be mapped on the the 5th, the 9th and the 12nd the OFDM symbol, perhaps on the the 5th, the 8th and the 12nd OFDM symbol, perhaps on the the 5th, the 9th and the 11st OFDM symbol or on the the 5th, the 8th and the 11st OFDM symbol.

3. method according to claim 1 is characterized in that, the multiplex mode that adopts between described a plurality of layers is any one in the following mode:

Adopt the mode of code division multiplexing between B1, each layer;

Adopt frequency division and/or time-multiplexed mode between B2, each layer, classify according to the employed number of layers of network side simultaneously, under the different class situations, in each Resource Block every layer according to different densities Resources allocation unit (RE);

B3, in number of layers smaller or equal to 2 o'clock, adopt the mode of code division multiplexing between each layer; In number of layers greater than 2 o'clock, the hybrid multiplex mode that adopts code division multiplexing to combine between each layer with frequency division and/or time division multiplexing;

B4, in number of layers smaller or equal to 2 or smaller or equal to 4 o'clock, adopt frequency division and/or time-multiplexed mode between each layer; Greater than 2 or greater than 4 o'clock, adopt frequency division and/or time-division to divide the hybrid multiplex mode that combines in number of layers between each layer with sign indicating number.

4. method according to claim 1, it is characterized in that, number of layers according to the actual use of system is classified to layer, map type for given number of layers interval, described a plurality of layers are divided into groups, adopt different multiplex modes between the respective layer of described grouping, concrete packet mode is any one in the following mode:

C1, the same group of interior mode that adopts code division multiplexing, the mode of employing time-division and/or frequency division multiplexing between the group;

C1, the same group of interior mode that adopts time-division and/or frequency division multiplexing, the mode of employing code division multiplexing between the group.

5. method according to claim 4 is characterized in that, every layer in the inhomogeneity is adopted identical or different average pilot density; Between the of a sort different layers, it is identical that the density of every layer demodulation data reference signal keeps.

6. according to any described method of claim in the claim 1 to 5, it is characterized in that, the number of layers of using according to reality is divided into mapping of low-rank class and the mapping of high order class with the type of shining upon, for described low-rank class mapping, the demodulation reference mark overhead on all layers is 8RE/RB or 12RE/RB; For described high order class mapping, the overhead of the demodulation reference mark on all layers is 24RE/RB, perhaps 16RE/RB, perhaps 18RE/RB.

7. method according to claim 1 is characterized in that, the selection mode of the time-domain position of described demodulation reference mark is any one in the following mode:

D1, when adopting code division multiplexing or code division multiplexing and frequency division and/or time division mixed multiplexing mode between the different layers, the time-domain position of described demodulation reference mark is positioned on the Resource Unit of the 5th, the 6th OFDM symbol and the 11st of a Resource Block, the 12nd OFDM symbol or the 5th, the 6th OFDM symbol and the 9th, the 11st OFDM symbol correspondence;

D2, when adopting frequency division and/or time division multiplexing mode between the different layers, the time-domain position of demodulation reference mark is positioned at the the 5th, the 9th and the 12nd OFDM symbol of a Resource Block, perhaps the the 5th, the 9th and the 11st OFDM symbol.

8. method according to claim 1 is characterized in that, on each OFDM symbol, two adjacent Resource Units of every layer of demodulation reference mark be spaced apart 3 or 4 Resource Units; Perhaps on each OFDM symbol, with 2 or 3 Resource Units of being spaced apart of adjacent two demodulation reference mark of one deck.

9. the mapping device of demodulation reference mark in the extended cyclic prefix in the advanced long-term evolution system is characterized in that,

Described mapping device is used for shining upon demodulation reference mark at the Resource Block that adopts extended cyclic prefix;

Described mapping device is on the time domain direction, never select one or more OFDM symbols to be used to carry described demodulation reference mark in the OFDM symbol that Be Controlled channel, common reference symbol and witness mark symbol take, and the mode of mixing by frequency division, time-division, sign indicating number branch or multiple multiplex mode between a plurality of layers is carried out orthogonal multiplex.

10. device according to claim 9 is characterized in that, when described mapping device is selected the OFDM symbol of the described demodulation reference mark of carrying, adopts in following three kinds of modes any one:

E1, described demodulation reference mark maximum take 4 OFDM symbols, and it is mapped on the the the 5th, the 6th, the 11st and the 12nd the OFDM symbol or the the the 5th, the 6th, the 9th and the 11st OFDM symbol on;

E2, described demodulation reference mark maximum take 2 OFDM symbols, and it is mapped on the 5th and the 12nd the OFDM symbol or the 5th and the 11st OFDM symbol on;

E3, described demodulation reference mark maximum take 3 OFDM symbols, and it is mapped on the the 5th, the 9th and the 12nd the OFDM symbol, perhaps on the the 5th, the 8th and the 12nd OFDM symbol, perhaps on the the 5th, the 9th and the 11st OFDM symbol or on the the 5th, the 8th and the 11st OFDM symbol.

11. device according to claim 9 is characterized in that, the multiplex mode that described mapping device adopts between a plurality of layers when the described demodulation reference mark of mapping is any one in the following mode:

Adopt the mode of code division multiplexing between F1, each layer;

Adopt frequency division and/or time-multiplexed mode between F2, each layer, classify according to the employed number of layers of network side simultaneously, under the different class situations, in each Resource Block every layer according to different densities Resources allocation unit;

F3, in number of layers smaller or equal to 2 o'clock, adopt the mode of code division multiplexing between each layer; In number of layers greater than 2 o'clock, the hybrid multiplex mode that adopts code division multiplexing to combine between each layer with frequency division and/or time division multiplexing;

F4, in number of layers smaller or equal to 2 or smaller or equal to 4 o'clock, adopt frequency division and/or time-multiplexed mode between each layer; Greater than 2 or greater than 4 o'clock, adopt frequency division and/or time-division to divide the hybrid multiplex mode that combines in number of layers between each layer with sign indicating number.

12. device according to claim 9, it is characterized in that, described mapping device is classified according to the number of layers of the actual use of system, class for given number of layers interval, described a plurality of layers are divided into groups, adopt different multiplex modes between the respective layer of described grouping, concrete packet mode is any one in the following mode:

G1, the same group of interior mode that adopts code division multiplexing, the mode of employing time-division and/or frequency division multiplexing between the group;

G2, the same group of interior mode that adopts time-division and/or frequency division multiplexing, the mode of employing code division multiplexing between the group.

13. device according to claim 12 is characterized in that, every layer in the inhomogeneity is adopted identical or different average pilot density; Between the of a sort different layers, it is identical that the density of every layer demodulation data reference signal keeps.

14. according to any described device of claim in the claim 9 to 13, it is characterized in that, the number of layers that described mapping device uses according to reality is divided into mapping of low-rank class and the mapping of high order class with the type of shining upon, for described low-rank class mapping, the demodulation reference mark overhead on all layers is 8RE/RB or 12RE/RB; For described high order class mapping, the overhead of the demodulation reference mark on all layers is 24RE/RB, perhaps 16RE/RB, perhaps 18RE/RB.

15. device according to claim 9 is characterized in that, described mapping device when selecting the time-domain position of described demodulation reference mark, in any one in the following ways:

H1, when adopting code division multiplexing or code division multiplexing and frequency division and/or time division mixed multiplexing mode between the different layers, the time-domain position of described demodulation reference mark is positioned on the Resource Unit (RE) of the 5th, the 6th OFDM symbol and the 11st of a Resource Block, the 12nd OFDM symbol or the 5th, the 6th OFDM symbol and the 9th, the 11st OFDM symbol correspondence;

H2, when adopting frequency division and/or time division multiplexing mode between the different layers, the time-domain position of demodulation reference mark is positioned at the the 5th, the 9th and the 12nd OFDM symbol of a Resource Block, perhaps the the 5th, the 9th and the 11st OFDM symbol.

16. device according to claim 9 is characterized in that, described mapping device when hinting obliquely at described demodulation reference mark, on each OFDM symbol, two adjacent Resource Units of every layer of demodulation reference mark be spaced apart 3 or 4 Resource Units; Perhaps with 2 or 3 Resource Units of being spaced apart of adjacent two demodulation reference mark of one deck.

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