CN1691545A - Method for distributing physical layer resources and device for receiving and transmitting data stream - Google Patents

Abstract

The invention discloses a method for allocating physical layer resources and an apparatus for receiving and transmitting. The method comprises: A. setting the reference time frequency pattern of the physical layer in the cell wireless communication system; B. making frequency domain circular shift on the reference time frequency pattern to get each basic time frequency pattern of the small section; C. having circular shift on the section basic time frequency pattern to get the different users' basic time frequency pattern; D. the transmitter sends the data flow image on the time frequency and the receiver extract the needed data for the received data flow according to the users' time frequency pattern. The inventive method applies OFDM technology in the cell wireless communication system without section synchronization and keeps the minimum disturbance. The said apparatus can receive and transmit data flow using the provided method.

Description

Distribute the method for physical layer resources and the device of transmitting-receiving data flow

Technical field

The physical layer resources that the present invention relates in the cellular radio Communication system that uses OFDM (OFDM) technology is provided with technology, particularly a kind of device that distributes the method for physical layer resources and utilize this method transmitting-receiving data flow in the cellular radio Communication system that uses the OFDM technology.

Background technology

Cellular radio Communication system is realized frequency reuse by a big service area is divided into many less overlay areas, to improve the capacity of cellular radio Communication system.Each little overlay area can be called as a sub-district (cell).In order to adopt frequency re-use factor is one planning and the frequency utilization efficient that improves cellular radio Communication system, and different cell can adopt identical frequency.But different cell adopts identical frequency can make the cell phase mutual interference that is operated under the same frequency.Thereby under the designing requirement of the cellular system situation that inter-user interference is as far as possible little in guaranteeing the sub-district, make also equalization as far as possible of presence of intercell interference.

More and more be subjected to people's attention owing to the ability of OFDM transmitting high speed data under wireless environment, at present, use OFDM technology has been proposed in cellular radio Communication system, the OFDM technology is divided into the narrowband subchannels of some quadratures with the physical layer resources of cellular radio Communication system in frequency domain, high-speed data-flow changes and conversion parallel transmission on each subchannel by string.Because the narrow-band characteristic of subchannel can overcome multi-path influence, has eliminated intersymbol interference greatly; Because the orthogonal property of subchannel, promptly the frequency spectrum between subchannel is overlapped, thereby has improved the utilance of frequency spectrum.Therefore, use the OFDM technology to become the development trend of mobile communication system gradually at cellular radio Communication system.

Physical layer resources in the cellular radio Communication system of employing OFDM technology can be regarded the two dimensional surface that is formed by " time domain " and " frequency domain " as, the available spectrum resource is divided into N fundamental frequency transmission unit, and fundamental frequency transmission unit is a sub-carrier frequency or the sub-band that formed by a plurality of sub-carrier frequency; Simultaneously, the physical layer resources of a transmission time periods (TTI) by M basic time transmission unit constitute, each, transmission unit comprised one or more OFDM symbols basic time.

Physical layer resources in the cellular radio Communication system of employing OFDM technology can be regarded the frequency patterns in this time-frequency plane as, the interior physical layer resources of TTI is divided into one group of frequency patterns, in the time-frequency multiplexing scheme of present 3gpp OFDM seminar, one group of frequency patterns in the same cell is to be obtained through the frequency domain cyclic shift by basic (basic) frequency patterns, the basic frequency patterns of different cell is again to be obtained through time-domain cyclic shift by same benchmark (generic) frequency patterns, and is obtained by the time-domain cyclic shift of generic frequency patterns through different time domain cyclic shift amount with the basic frequency patterns of different cell frequently.

If the generic frequency patterns is TF ₀ ⁰, its time domain is transmission unit index basic time, frequency domain is a fundamental frequency transmission unit index, is expressed as follows:

$\mathrm{<figure-callout\; id="0"\; label="T\; F"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">T</figure-callout>}{F_{}}^{}{{}_0}^0\left(k\right)={\mathrm{<figure-callout\; id="0"\; label="s"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">s</figure-callout>}}_0^0\left(k\right)$ k＝0，1，2，…，(M-1)

Wherein, the subscript of TF 0 expression time-domain cyclic shift be 0 basic time transmission unit, subscript 0 expression frequency domain cyclic shift is 0 fundamental frequency transmission unit, k represents transmission unit index basic time, S ₀ ⁰(k) the frequency transmission cell value that takies in k time transmission unit of expression.

The basic frequency patterns of the cell that generates behind the generic frequency patterns process time-domain cyclic shift t is:

$T{F}_0^t\left(k\right)=s_0^t\left(k\right)$ k＝0，1，2，…(M-1)

Wherein $s_0^t\left(k\right)=s_0^t\left((k+t)\mathrm{mod}M\right).$

Basic frequency patterns TF ₀ ^tThrough the pattern that generates behind the frequency domain cyclic shift f be:

$T{F}_f^t\left(k\right)=s_f^t\left(k\right)$ k＝0，1，2，…(M-1)

Wherein $s_f^t\left(k\right)={(s}_0^t\left(k\right)+f)\mathrm{mod}N.$

In present scheme, the generic frequency patterns derives from one and longly is the Costas sequence of N, and this sequence is:

TFP _genric＝{p(0)，p(1)，p(2)，…，p(N-1)}

Length is the Costas sequence { P of L ₀, P ₁, P ₂..., P _L-1Be defined as 1,2 ... the constant series of N}, satisfy:

P _I+n-P _i≠ P _J+n-P _jIf i ≠ j, i represents different n positions respectively with j.

There is not intersection point between the sequence that obtains after Costas sequence and its any acyclic time domain and the frequency domain displacement.Intersection point seldom between the sequence that obtains after Costas sequence and its any circulation time domain and the frequency domain displacement.

Generally, the index of basic frequency domain transmission unit is from 0 to N-1, for describe formula convenient for the purpose of, we define new sequence { p ₀p ₁, p ₂..., p _L-1Satisfy:

p(k)＝P(k)-l k＝0，1，2，…，(L-1)

Thereby { p ₀p ₁, p ₂..., p _L-1) be one long for L 0,1,2 ..., constant series L-1), and have:

p _i+n-p _i≠p _j+n-p _j if?i≠j

This sequence still has the character of above-mentioned Costas sequence, and here, we claim that still it is a Costas sequence.

In present scheme, the generic frequency patterns is obtained through conversion by this Costas sequence:

When M＜=N, ${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0\left(k\right)=p\left(k\right)$ k＝0，l，2，…(M-1)

Be that the generic frequency patterns is the preceding M position generation by the Costas sequence;

When M＞N, ${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0\left(k\right)=p\left(k\right)$ Work as k=0,1,2 ... (N-1)

${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0\left(k\right)=p(M-k-1)$ Work as k=N, (N+1) ..., (M-1)

Be the generic frequency patterns be by in the top n element cascade of Costas sequence before it backward of (M-N) individual element generate.

According to the characteristic of Costas sequence as can be known, the generic frequency patterns that is formed by this mode satisfies following character:

1, the frequency patterns that generates after any two different frequency domain cyclic shifts of same basic frequency patterns is non-intersect.Be TF _F1 ^t, with TF _F2 ^tWhen f1 ≠ f2, there is not intersection point; That is to say, be that the frequency patterns that generates of different user is non-intersect by the basic frequency patterns in the same cell.

2, the frequency patterns that generates after any two different frequency domain cyclic shifts of different basic frequency patterns does not have intersection point or intersection point seldom.Be TF _F1 ^T1With TF _F2 ^T2When t1 ≠ t2, no intersection point or intersection point are seldom.Same, adopt same frequency two cell any two frequency patterns intersection point seldom.

3, generic frequency patterns and enough disperse by the lattice point of other frequency patterns on time-frequency plane that its generates.Two adjacent lattice point minimum value and value are bigger, and in the scheme, minimum value is 3 at present.That is to say that the frequency patterns that this mode forms has good frequency diversity effect.

Below illustrate in the present scheme and how to form the generic frequency patterns by the Costas sequence.The usable spectrum resource that is provided with in the cellular radio Communication system of whole employing OFDM technology is divided into the N sub-frequency bands at frequency domain, and N is that 15, one TTI comprise M OFDM symbol, and M has two kinds of settings, and first kind is 27 symbols, and second kind is 12 symbols.The length of Costas sequence is 15:TFP _Generic=12,4,2,8,1,13,10,14,3,11,6,9,0,5,7}

Show on the time-frequency plane, then shown in figure l.

To first kind of setting, the generic frequency patterns becomes the form of sequence to be by the sequential write of transmission unit basic time:

${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0=\left\{\mathrm{12,4,2,8,1,13,10,14,3,11,6,9,0,5,7,9,6,11,3,14,10,1,8,2,4,12}\right\}$

To second kind of setting, the generic frequency patterns becomes the form of sequence to be by the sequential write of transmission unit basic time:

${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0=\left\{\mathrm{12,4,2,8,1,13,10,14,3,11,6,9}\right\}.$

In fact, in the cellular radio Communication system that adopts the OFDM technology, often do not reach requirement synchronous between the cell, thereby finally be the possibly feature that can't guarantee character 2 of frequency patterns of the different user generation of different cell: because asynchronous between each cell, might cause the frequency patterns of each cell that the generic frequency patterns obtains after time domain displacement identical, thereby cause the interference between cell.Therefore, in present scheme, in order to reduce interference problem between the asynchronous cell that brings between cell as far as possible, the basic frequency patterns of different cell and will carry out the time-domain cyclic shift of variable step size over time by other frequency patterns that generates through the frequency domain cyclic shift, different cell controls the symbolic number that time dependent time domain circulation is offset with self different scrambler sequence.In this way, even two synchronous at certain TTI with frequency cell, they are very little in the synchronous again possibility of next TTI.

The method of salary distribution of this physical layer resources of scheme employing at present is relatively more responsive to the influence of time migration., the basic frequency patterns between cell realizes that in not requiring synchronous system, the frequency patterns that just needs each cell is change at random in time, to avoid the frequency patterns between cell overlapping because being the different time skew by same generic frequency patterns.Scheme adopts the symbolic number of utilizing the different scrambler sequence of each cell to control time dependent time domain circulation skew at present, thereby the frequency patterns that each cell is obtained is not overlapped.But implement more complicated, and it may occur that still: two time offset with the relative Costas sequence of cell selection frequently by chance make that all frequency patterns of two cell are overlapping, and are very big in this interference between two cell constantly.Although this situation may reduce the probability that takes place owing to rational cell scrambler design, but still is inevitable.

On the other hand, the also feasible receiver of the cellular radio Communication system of OFDM technology that adopts of the physical layer resources method of salary distribution of the different cell of this change at random in time need be determined each frequency patterns of this cell employing constantly, has increased the difficulty of receiver.For example: even receiver has been known the scrambler that cell adopts, known the position of TTI head, needed also to know that the position that current TTI is arranged in scrambler sequence can determine the frequency patterns that the active user adopts, finishing the extraction of user data.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method of distributing physical layer resources, this method can make the cellular radio Communication system that adopts the OFDM technology not have requirement synchronously between cell, also not need to utilize under the situation of each cell different scrambling codes sequence, just can guarantee that the interference between cell is little, and simple to the distribution of physical layer resources, keep disturbing in the cell little and frequency diversity good effectiveness.

The present invention provides a kind of device of transmitting-receiving data flow on the other hand, and this device can be realized each user's data of transmitting-receiving on based on the method for distributing physical layer resources.

According to above-mentioned purpose, technical scheme of the present invention is achieved in that

A kind of method of distributing physical layer resources, this method comprises:

A, the reference time frequency pattern of physical layer resources in the cellular radio Communication system is set;

B, this reference time frequency pattern is carried out the frequency domain cyclic shift by the frequency domain cyclic shift amount of determining obtain each basic time frequency pattern;

C, each basic time frequency pattern are carried out the frequency patterns that time-domain cyclic shift obtains each sub-district different user by the time-domain cyclic shift amount of determining;

The data flow that transmit leg in D, the cellular radio Communication system will send according to resulting frequency patterns is mapped on the corresponding frequency patterns and sends; The recipient separates from the data flow that receives according to resulting frequency patterns and maps out corresponding data.

When the frequency of other sub-districts in the frequency of the described sub-district of step B and the cellular radio Communication system was identical, the described frequency domain cyclic shift of step B amount was different with the frequency domain cyclic shift amount of these other co-frequency cells of system.

The reference time frequency pattern of the described setting of steps A is to generate by the segment of Costas sequence or Costas sequence or Costas sequence with through the segment combination of the Costas sequence of backward conversion or more than one Costas sequence with through the segment combination of the Costas sequence of backward conversion.

The frequency patterns of described each the sub-district different user of comparison step C, when joining appears in the frequency patterns of each sub-district different user, this method further comprises: the frequency patterns that this joining is belonged to one of them community user, other community users that take this joining punch this joining, and its frequency patterns does not comprise this joining.

The time-domain cyclic shift amount of the described time-domain cyclic shift of step C changes in time.

A kind of device of transmitting-receiving data flow, this device is made up of user's frequency patterns generation unit, transmitter unit and receiving element, and wherein, user's frequency patterns generation unit comprises:

The reference time frequency pattern maker is used to generate reference time frequency pattern and sends to the basic frequency patterns maker in sub-district;

The basic frequency patterns indicating device in sub-district is used for sending the indication that generates the basic frequency patterns rule in sub-district to the basic frequency patterns maker in sub-district;

The basic frequency patterns maker in sub-district, be used for indication according to the basic frequency patterns indicating device in sub-district, the reference time frequency pattern of sending from the reference time frequency pattern maker is generated the operation of the basic frequency patterns rule in sub-district, obtain basic time frequency pattern and send to user's running time-frequency resource indicating device;

User's frequency patterns indicating device is used for sending the indication that generates user's frequency patterns rule to user's running time-frequency resource indicating device;

User's running time-frequency resource indicating device, be used for indication according to user's frequency patterns indicating device, the resource information of CU is obtained in the operation that the basic frequency patterns that the basic frequency patterns maker transmission from the sub-district is come generates user's frequency patterns rule, and the resource information of CU is sent to physical channel mapper or physical channel de-mapping device;

Transmitter unit comprises:

Physical channel mapper is used for the resource information that sends according to user's running time-frequency resource indicating device and will the transmitting users message bit stream be mapped in and sends to the transmission processor on the time-frequency plane;

Send processor, the user profile bit stream that is mapped on the time-frequency plane that is used for obtaining from physical channel mapper sends;

Receiving element comprises:

Receiving processor, be used to receive the user profile on the time-frequency plane of being mapped in of cellular radio Communication system transmission;

The physical channel de-mapping device, be used for to separate mapping from the user profile that is mapped on the time-frequency plane that receiving processor transmits, obtain the user profile bit stream according to the resource information that user's running time-frequency resource indicating device sends.

The basic frequency patterns indicating device in described sub-district is to the indicated frequency domain cyclic shift amount difference of carrying out the frequency domain cyclic shift in the sub-district that takies same frequency.

The reference time frequency pattern that described reference time frequency pattern maker generates is to generate by the segment of Costas sequence or Costas sequence or Costas sequence with through the segment combination of the Costas sequence of backward conversion or more than one Costas sequence with through the segment combination of the Costas sequence of backward conversion.

The basic frequency patterns rule in described generation sub-district is for to carry out the frequency domain cyclic shift to reference time frequency pattern.

The basic frequency patterns rule in described generation sub-district is for to carry out time-domain cyclic shift to the basic frequency patterns in sub-district.

From such scheme as can be seen, method provided by the invention makes one group of frequency patterns in the same cell be obtained through time-domain cyclic shift by a basic frequency patterns, the basic frequency patterns of different cell is obtained through the frequency domain cyclic shift by same generic frequency patterns, thereby can in cell, solve the influence of time, this method is more controlled, do not need the synchronous requirement between cell, do not need complicated scrambler design to avoid disturbing over time between cell yet.Therefore, this method is not having requirement synchronously between cell, is not needing to utilize under the situation of each cell different scrambling codes sequence yet, just can guarantee that the interference between cell is little, and simple to the distribution of physical layer resources, keep disturbing in the cell little and frequency diversity good effectiveness.Further, the present invention also provides the device of transmitting-receiving data flow, and this device is realized each user's data of transmitting-receiving based on the method for above-mentioned distribution physical layer resources.

Description of drawings

Fig. 1 is the schematic diagram of Costas sequence at time-frequency plane.

Fig. 2 is the transmitter structure chart in the cellular radio Communication system of the present invention.

Fig. 3 is the receiving equipment structure chart in the cellular radio Communication system of the present invention.

Fig. 4 is generic in the embodiment of the invention and the schematic diagram of basic frequency patterns on time-frequency plane of cell.

Fig. 5 is the user's of the basic frequency patterns of the cell A in the embodiment of the invention and cell A the schematic diagram of frequency patterns on time-frequency plane.

Fig. 6 is the user's of a user's the frequency patterns of the cell A in the embodiment of the invention and cell B the schematic diagram of frequency patterns on time-frequency plane.

Embodiment

In order to make 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 further elaborated.

In the present invention, physical layer resources in the cellular radio Communication system of employing OFDM technology can be regarded the two dimensional surface that is formed by " time domain " and " frequency domain " as, the interior physical layer resources of TTI is divided into one group of frequency patterns, one group of frequency patterns in the same cell is to be obtained through time-domain cyclic shift by a basic frequency patterns, the basic frequency patterns of different cell is to be obtained through the frequency domain cyclic shift by same generic frequency patterns, and the basic frequency patterns with different cell is frequently obtained through different frequency domain cyclic shifts by the generic frequency patterns, and is less with the interference ratio that guarantees different cell.

It is TF that the generic frequency patterns is set ₀ ⁰, its time domain is transmission unit index basic time, frequency domain is a fundamental frequency transmission unit index, is expressed as follows:

${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0\left(k\right)={\mathrm{<figure-callout\; id="0"\; label="s"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">s</figure-callout>}}_0^0\left(k\right)$ k＝0，1，2，…，(M-1)

Wherein, the subscript of TF 0 expression time-domain cyclic shift be 0 basic time transmission unit, subscript 0 expression frequency domain cyclic shift is 0 fundamental frequency transmission unit, k represents transmission unit index basic time, S ₀ ⁰(k) the frequency transmission unit index that takies in k time transmission unit of expression can be vector, promptly in frequency transmission unit that moment k can take above one.

Generic frequency patterns TF ₀ ⁰Through the basic frequency patterns that generates behind the frequency domain cyclic shift f be:

${\mathrm{TF}}_f^0\left(k\right)=s_f^0\left(k\right)$ K=0,1,2 ... (M-1), wherein $s_f^0\left(k\right)=({\mathrm{<figure-callout\; id="0"\; label="s"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">s</figure-callout>}}_0^0\left(k\right)+f)\mathrm{mod}N$

The generic frequency patterns will be as the basic frequency patterns of different cell through the basic frequency patterns that generates after the different frequency domain cyclic shifts.Basic frequency patterns with frequency cell is obtained through different frequency domain cyclic shifts by the generic frequency patterns.By this method, the different basic frequency patterns that obtained by the generic frequency patterns mostly are N most.

Basic frequency patterns TF _f ⁰Through the frequency patterns that generates behind the time-domain cyclic shift t be:

${\mathrm{TF}}_f^t\left(k\right)=s_f^t\left(k\right)$ K=0,1,2 ... (M-1), wherein $s_f^t\left(k\right)=s_f^0\left((k+t)\mathrm{mod}M\right)$

Get different t values and can obtain different frequency patterns, by this method, the interior different frequency patterns that obtained by the basic frequency patterns of cell mostly are M most.

Character below the generic frequency patterns that the present invention selects satisfies:

1, the frequency patterns intersection point that generates after any two different time domain cyclic shifts of same basic frequency patterns seldom.Be TF _f ^T1With TF _f ^T2When t1 ≠ t2, intersection point seldom; That is to say, in the same cell by the basic frequency patterns be the frequency patterns intersection point that generates of different user seldom.

2, the frequency patterns intersection point that generates after any two different time domain cyclic shifts of different basic frequency patterns seldom.Be TF _F1 ^T1With TF _F2 ^T2When f1 ≠ f2, intersection point seldom.Same, adopt same frequency two cell any two frequency patterns intersection point seldom.

3, generic frequency patterns and enough disperse by the lattice point of other frequency patterns on time-frequency plane that its generates.That is to say that the frequency patterns that this mode forms has good frequency diversity effect.

In order to increase user's diversity, the skew of the frequency patterns time corresponding of same CU can change in time among the cell.The basic frequency patterns of different cell also can change along with the variation of time, but the frequency shift (FS) that will guarantee to take the basic frequency patterns correspondence between the cell that same frequency interferes with each other is different.

In the present invention, basic frequency patterns between cell is distinguished by frequency domain shift, the time domain displacement is used as the differentiation foundation of different frequency patterns in the same cell, the present invention can solve the influence of time in cell, therefore, method provided by the invention is more controlled, does not need the synchronous requirement between cell, does not also need complicated scrambler design to avoid disturbing over time between cell.

Below specifying method provided by the invention is how to be applied in the cellular radio Communication system that adopts the OFDM technology.

As shown in Figure 2, Fig. 2 is the transmitter structure chart in the cellular radio Communication system of the present invention: this transmitter comprises generic frequency patterns maker 200, cell basic frequency patterns indicating device 201, cell basic frequency patterns maker 202, user's frequency patterns indicating device 203, user's running time-frequency resource indicating device 204, physical channel mapper 205 and sends processor 206.

Wherein, generic frequency patterns maker 200 is used to generate the generic frequency patterns and sends to cell basic frequency patterns maker 202;

Cell basic frequency patterns indicating device 201 is used for the basic frequency patterns according to the basic frequency patterns create-rule indication distribution cell of cell;

Cell basic frequency patterns maker 202 is used for the indication according to cell basic frequency patterns indicating device 201, the generic frequency patterns of sending from generic frequency patterns maker 200 is carried out the frequency domain circulative shift operation, obtain the basic frequency patterns of this cell;

User's frequency patterns indicating device 203 is used for the frequency patterns according to user's employing in the create-rule indication cell of the user's frequency patterns in the cell;

User's running time-frequency resource indicating device 204 is used for the indication according to user's frequency patterns indicating device 203, to obtain the resource information of this CU on the time-frequency plane on the basic frequency patterns of coming from 202 transmission of cell basic frequency patterns maker by time-domain cyclic shift;

Physical channel mapper 205 is used for according to the resource information of user's running time-frequency resource indicating device 204 indications the user profile bit stream being mapped in time-frequency plane;

The user profile bit stream that is mapped on the time-frequency plane that transmission processor 206 is used for obtaining from physical channel mapper 205 sends.

As shown in Figure 3, Fig. 3 is the receiving equipment structure chart in the cellular radio Communication system of the present invention: this receiving equipment comprises generic frequency patterns maker 200, cell basic frequency patterns indicating device 201, cell basic frequency patterns maker 202, user's frequency patterns indicating device 203, user's running time-frequency resource indicating device 204, physical channel de-mapping device 300 and receiving processor 301.

Wherein generic frequency patterns maker 200, cell basic frequency patterns indicating device 201, cellbasic frequency patterns maker 202, user's frequency patterns indicating device 203, user's running time-frequency resource indicating device 204 all are the same with the unit several of the same name of transmitting apparatus on function and structure, thereby no longer repeat.

Receiving processor 301 is used to receive the user resources information on the time-frequency plane of being mapped in of cellular radio Communication system transmission;

Physical channel de-mapping device 300 is used for according to the resource information of user's running time-frequency resource indicating device 204 indications the user resources information that receiving processor 301 transmits being separated mapping, obtains user profile bit stream and output.

Respectively the main modular of Fig. 2 and Fig. 3 is described in detail below:

A, generic frequency patterns maker 200

Generic frequency patterns in generic frequency patterns maker 200 is obtained by the Costas sequence transformation.Suppose time-frequency plane in the TTI be by M basic time transmission unit and the set of the two-dimentional lattice point that forms of N fundamental frequency transmission unit.The generation of this generic frequency patterns is L=min{M by means of length, and the Costas sequence of N} claims that this sequence is a consensus sequence, is designated as:

TF _Pgeneric＝{p(0)，p(1)，p(2)，…，p(L-1)}。

The generic frequency patterns is:

${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0\left(k\right)={\mathrm{<figure-callout\; id="0"\; label="s"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">s</figure-callout>}}_0^0\left(k\right)$ k＝0，1，2，…，(M-1)

Wherein, the subscript of TF 0 expression time-domain cyclic shift be 0 basic time transmission unit, subscript 0 expression frequency domain cyclic shift is 0 fundamental frequency transmission unit, k represents transmission unit value basic time, S ₀ ⁰(k) be illustrated in the frequency transmission cell value that takies in the time transmission unit value of k, can be vector.

The generic frequency patterns is obtained like this by consensus sequence:

I) when M=N, ${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0\left(k\right)=p\left(k\right)$ k＝0，1，2，…(M-1)

Be that the generic frequency patterns is generated by consensus sequence fully;

Ii) when M＞N, this moment, L=N was divided into whole TTI Individual sub-TTI, the front

Individual sub-TTI is long to be to satisfy i by N) condition, the generic frequency patterns of this part can be by criterion i) generate.The frequency patterns that generates by the segment of consensus sequence in the cascade afterwards, for example during N＜M＜2N,

${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0\left(k\right)=p\left(k\right)$ Work as k=0,1,2 ... (N-1)

${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0\left(k\right)=p(M-k-1)$ Work as k=N, (N+1) ..., (M-1)

Promptly by in the top n element cascade of consensus sequence before it backward of (M-N) individual element generate.Certainly, other generating mode can also be arranged, generate such as backward by its arbitrarily continuous (M-N) individual element in the top n element cascade of consensus sequence.

Iii) when M＜N, this moment, L=M was divided into whole transmission band earlier Sub-frequency bands, preceding The number of the frequency transmission unit in the sub-frequency bands all is M, thereby can be by i) criterion generate this part frequency patterns.Segment that can the selection reference sequence in last sub-band generates the frequency patterns of this part.

For example during M＜N＜2M,

${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0\left(k\right)=p\left(k\right)$ Work as k=0,1,2 ... (M-1)

${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0\left(p^{-1}\left(k\mathrm{mod}M\right)\right)=k$ Work as k=M, (M+1) ..., (N-1)

Here, p ^-1The inverse function of () expression p, this mode makes and all carries information on each frequency transmission unit.In this case, in the transmission unit, can take a plurality of frequency domain unit at the same time.

The generic frequency patterns that generates at generic frequency patterns maker 200 satisfies above-mentioned character 1,2 and 3.

B, cell basic frequency patterns indicating device 201

Among the present invention, the basic frequency patterns create-rule of the cell in cell basic frequency patterns indicating device 201 is:

${\mathrm{TF}}_f^0\left(k\right)=s_f^0\left(k\right)$ K=0,1,2 ... (M-1), wherein $s_f^0\left(k\right)=({\mathrm{<figure-callout\; id="0"\; label="s"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">s</figure-callout>}}_0^0\left(k\right)+f)\mathrm{mod}N$

The basic frequency patterns that need overcome the cell of phase mutual interference is obtained through different frequency domain cyclic shifts by the generic frequency patterns.By this method, the different basic frequency patterns that obtained by the generic frequency patterns mostly are N most.

Therefore, cell basic frequency patterns indicating device 201 output variables comprise the frequency offset of the basic frequency patterns correspondence of cell at least.

The basic frequency patterns of a cell can be fixed, also can change in time, can the different frequency domain cyclic shift by the generic frequency patterns obtain in the different moment, just guarantee to obtain through different frequency domain cyclic shifts by the gengric frequency patterns with the basic frequency patterns of frequency cell.

C, cell basic frequency patterns maker 202

Cell basic frequency patterns maker 202 is operated the generic frequency patterns according to the indication of cell basic frequency patterns indicating device 201, obtains the basic frequency patterns of cell.

For example, if cell basic frequency patterns indicating device 201 has been indicated the frequency offset f of the basic frequency patterns correspondence of certain cell, the gengric frequency patterns is

${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0\left(k\right)={\mathrm{<figure-callout\; id="0"\; label="s"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">s</figure-callout>}}_0^0\left(k\right)$ K=0,1,2 ..., (M-1), then cell basic frequency patterns is:

${\mathrm{TF}}_f^0\left(k\right)=s_f^0\left(k\right)$ K=0,1,2 ... (M-1), wherein $s_f^0\left(k\right)=({\mathrm{<figure-callout\; id="0"\; label="s"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">s</figure-callout>}}_0^0\left(k\right)+f)\mathrm{mod}N$

D, user's frequency patterns indicating device 203

User's frequency patterns indicating device 203 is according to the rule of the frequency patterns of the CU in the cell, the indication that produces the frequency patterns of certain CU.This indication will act on the basic frequency patterns of cell, to obtain the running time-frequency resource that the user specifically takies.

Among the present invention, the frequency patterns of CU is the basic frequency patterns TF by cell in the cell _f ⁰Pattern through generating behind the time-domain cyclic shift t is designated as:

${\mathrm{TF}}_f^t\left(k\right)=s_f^t\left(k\right)$ K=0,1,2 ... (M-1), wherein $s_f^t\left(k\right)=s_f^0\left((k+t)\mathrm{mod}M\right)$

Get different t values and can obtain different frequency patterns, by this method, the maximum M of different frequency patterns that obtain by the basic frequency patterns in the same cell.

When M＜=N, according to the character of consensus sequence as can be known, this basic frequency patterns by cell is disjoint through two frequency patterns that the different time domain cyclic shift mode produces.When M＞N, the pattern that obtains after the different time cyclic shifts has intersection point, but because two such patterns are positioned at a cell, and the intersection point number seldom, thereby the situation that intersection point occurs is soluble.Definition rule of the present invention solves the crossing problem of the frequency patterns of different time displacement in the cell, this rule predetermining the attaching problem of overlapping point.For example be defined in the bigger sequence of time-domain cyclic shift amount t, the time-frequency lattice point corresponding with the overlapping element of less cyclically shifted sequences will not be used to transmit data, promptly be perforated.Overlapping point belongs to the frequency patterns of the time offset t correspondence of utilizing this point at first.Utilize this rule, obtained not having between the user of cell appropriate adoption the frequency patterns of intersection point, the distribution of different user running time-frequency resource is based on this new frequency patterns.

The running time-frequency resource of same CU can be fixed in the cell, also can change in time.That is to say that constantly the physical layer resources of same CU can be generated through different time-domain cyclic shift by the basic frequency patterns, thereby can better utilization running time-frequency resource and frequency diversity gain in difference.For example, can adopt the maximum linear shift register on the non-two-value finite field, generate the time offset that value is positioned at 0～M-1 randomly, the frequency patterns that the user adopts in the cell is carried out the adjustment of side-play amount according to the random offset that produces.For example, if the side-play amount that certain user adopts in the cell is t ₀, the value m of corresponding linear shift register, then Shi Ji time offset is (t ₀+ m) modM.

The major function of user's frequency patterns indicating device 203 is frequency patterns that the user is distributed in indication.For example can export the time-domain cyclic shift amount of basic frequency patterns.Same user can have a plurality of frequency patterns simultaneously.Thereby user's frequency patterns indicating device 203 can be indicated the occupancy mode of a plurality of running time-frequency resources of same user.

E, user's running time-frequency resource indicating device 204

It is input as the indication of 203 pairs of user's frequency patterns of user's frequency patterns indicating device, and the cell basic frequency patterns of cellbasic frequency patterns maker 202 outputs, and output will be used for instructing user profile stream how to be mapped on the physical channel 205.User's running time-frequency resource indicating device 204 is operated cell basic frequency patterns by the rule of user's frequency patterns indicating device 203 indications, finishes the distribution of user's resource on time-frequency plane.

Described operation rules mainly is the time domain displacement of cell basic frequency patterns being carried out a fixed step size.If cell basic frequency patterns is ${\mathrm{TF}}_f^0\left(k\right)=s_f^0\left(k\right)$ K=0,1,2 ... (M-1), the value of user's frequency patterns indicating device input is t, and then the running time-frequency resource of the CU of user's running time-frequency resource indicating device 205 outputs is

${\mathrm{TF}}_f^t\left(k\right)=s_f^t\left(k\right)$ k＝0，1，2，…(M-1)，

Wherein $s_f^t\left(k\right)=s_f^0\left((k+t)\mathrm{mod}M\right).$

F, physical channel mapper 205

It is input as the user resources frequency patterns of user's data stream and 204 outputs of user's running time-frequency resource indicating device, and output is mapped in user's resource information stream on the time-frequency plane.

The mapping mode of physics running time-frequency resource be by basic time transmission unit in sequence, promptly export in turn fundamental frequency unit that fundamental frequency unit that basic time, transmission unit 0 took, basic time, transmission unit 1 took ..., the fundamental frequency unit that transmission unit basic time (M-1) takies.After the mapping through the physical layer running time-frequency resource, promptly can send and handle.

G, transmission processor 206

It adopts IFFT to pass through formed filter from the physical layer running time-frequency resource that physical channel mapper 205 transmits through mapping, and digital-to-analogue conversion is launched.

H, physical channel are separated mapping 300

It is input as through basic and receives the data flow handled and the indication about the user resources distribution condition of user's running time-frequency resource indicating device 204 outputs, and this functional unit extracts and exports according to the indication of user's running time-frequency resource indicating device 204 information with this user in the data flow that receives.Which frequency patterns what user's running time-frequency resource indicating device 204 will indicate that customer traffic takies when sending is, thereby can extract each user's data from the data flow that receives.

The physics running time-frequency resource separate mapping, be still by basic time transmission unit in sequence, promptly export in turn data in the fundamental frequency unit of CU in data in the fundamental frequency unit of this CU in the transmission unit 0 basic time, the basic time transmission unit 1 ... data in transmission unit basic time (M-1) in the fundamental frequency unit of this CU, thereby the data flow order when recovering emission.

Provide a concrete example below, being provided with has M=15 OFDM symbol in the TTI, each OFDM symbol as one basic time transmission unit.The frequency domain that physical layer resources is set can be divided into N=15 fundamental frequency transmission unit.The time-frequency plane of physical layer resources can be divided into 15*15 time-frequency lattice point.This example is only considered the situation of two adjacent cell.

The consensus sequence that we adopt be one long be 15 Costas sequence, because of M=N, the generic frequency patterns becomes the form of sequence to be by the sequential write of transmission unit index basic time:

${{\mathrm{<figure-callout\; id="0"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_0}^0=\left\{\mathrm{12,4,2,8,1,13,10,14,3,11,6,9,0,5,7}\right\}$

The basic frequency patterns of cell A is that this gengeric frequency patterns obtains after 2 fundamental frequency transmission unit displacements, and the form of being write as sequence is

${\mathrm{<figure-callout\; id="2"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_2^0=\left\{\mathrm{14,6,4,10,3,0,12,1,5,13,8,11,2,7,9}\right\}$

Band lattice point among Fig. 4 is seen in expression in time-frequency plane.

To be this gengric frequency patterns obtain after 5 fundamental frequency transmission units displacements the basic frequency patterns of cell B, the form of being write as sequence promptly:

${\mathrm{<figure-callout\; id="5"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_5^0=\left\{\mathrm{2,9,7,13,6,3,0,4,8,1,11,14,5,10,12}\right\}$

Perpendicular line lattice point among Fig. 4 is seen in expression in time-frequency plane.The black lattice point is the generic frequency patterns among Fig. 4.

As can be seen from Figure 4, the basic frequency patterns of these two cell does not have intersection point.

All frequency patterns in each cell all are to pass through time-domain cyclic shift by basic frequency patterns separately to obtain, the 3rd frequency patterns is by obtaining after the time cyclic shift of its basic frequency patterns through 2 symbols among the cell A, and the form of being write as sequence is:

${\mathrm{<figure-callout\; id="2"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_2^2=\left\{\mathrm{4,10,3,0,12,1,5,13,8,11,2,7,14,6}\right\}$

As the oblique lattice point in the left side among Fig. 5.As seen, the 1st frequency patterns in the cell A, promptly basic frequency patterns and the 3rd frequency patterns are disjoint.

The 8th frequency patterns is by obtaining after the time cyclic shift of its basic frequency patterns through 7 symbols among the Cell B, and the form of being write as sequence is:

${\mathrm{<figure-callout\; id="5"\; label="TF"\; filenames="A20041003883500221.png,A20041003883500251.png"\; state="\{\{state\}\}">TF</figure-callout>}}_5^7=\left\{\mathrm{0,4,8,1,11,14,5,10,12,2,9,7,13,6,3}\right\}$

See the right tiltedly lattice point among Fig. 6.Left side among Fig. 6 tiltedly lattice point is the 3rd frequency patterns of cell A, and as seen, the 8th frequency patterns of cell B and the 3rd frequency patterns of cell A have two intersection points, respectively at the symbol place of label 6 and the symbol place of label 11.

Method provided by the invention at first can satisfy the frequency patterns intersection point seldom, disturbs little between cell.In addition, in the method provided by the invention, " time domain " displacement is used as the differentiation foundation of different frequency patterns in the same cell, frequency patterns between cell is distinguished by " frequency domain " displacement, thereby can solve the influence of time in cell, and is more controlled, do not need the synchronous requirement between cell, do not need complicated scrambler design to avoid disturbing over time between cell yet, simultaneously, also kept the requirement of minimum interference in the cell.

The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1, a kind of method of distributing physical layer resources is applied to use the cellular radio Communication system of orthogonal frequency division multiplexi, it is characterized in that this method comprises:

A, the reference time frequency pattern of physical layer resources in the cellular radio Communication system is set;

B, this reference time frequency pattern is carried out the frequency domain cyclic shift by the frequency domain cyclic shift amount of determining obtain each basic time frequency pattern;

C, each basic time frequency pattern are carried out the frequency patterns that time-domain cyclic shift obtains each sub-district different user by the time-domain cyclic shift amount of determining;

The data flow that transmit leg in D, the cellular radio Communication system will send according to resulting frequency patterns is mapped on the corresponding frequency patterns and sends; The recipient separates from the data flow that receives according to resulting frequency patterns and maps out corresponding data.

2, the method for claim 1, it is characterized in that, when the frequency of other sub-districts in the frequency of the described sub-district of step B and the cellular radio Communication system was identical, the described frequency domain cyclic shift of step B amount was different with the frequency domain cyclic shift amount of these other co-frequency cells of system.

3, the method for claim 1, it is characterized in that the reference time frequency pattern of the described setting of steps A is to generate by the segment of Costas sequence or Costas sequence or Costas sequence with through the segment combination of the Costas sequence of backward conversion or more than one Costas sequence with through the segment combination of the Costas sequence of backward conversion.

4, the method for claim 1, it is characterized in that, the frequency patterns of described each the sub-district different user of comparison step C, when joining appears in the frequency patterns of each sub-district different user, this method further comprises: the frequency patterns that this joining is belonged to one of them community user, other community users that take this joining punch this joining, and its frequency patterns does not comprise this joining.

5, the method for claim 1 is characterized in that, the time-domain cyclic shift amount of the described time-domain cyclic shift of step C changes in time.

6, a kind of device that utilizes the described method transmitting-receiving data flow of claim 1 is characterized in that, this device is made up of user's frequency patterns generation unit, transmitter unit and receiving element, and wherein, user's frequency patterns generation unit comprises:

The reference time frequency pattern maker is used to generate reference time frequency pattern and sends to the basic frequency patterns maker in sub-district;

The basic frequency patterns indicating device in sub-district is used for sending the indication that generates the basic frequency patterns rule in sub-district to the basic frequency patterns maker in sub-district;

The basic frequency patterns maker in sub-district, be used for indication according to the basic frequency patterns indicating device in sub-district, the reference time frequency pattern of sending from the reference time frequency pattern maker is generated the operation of the basic frequency patterns rule in sub-district, obtain basic time frequency pattern and send to user's running time-frequency resource indicating device;

User's frequency patterns indicating device is used for sending the indication that generates user's frequency patterns rule to user's running time-frequency resource indicating device;

User's running time-frequency resource indicating device, be used for indication according to user's frequency patterns indicating device, the resource information of CU is obtained in the operation that the basic frequency patterns that the basic frequency patterns maker transmission from the sub-district is come generates user's frequency patterns rule, and the resource information of CU is sent to physical channel mapper or physical channel de-mapping device;

Transmitter unit comprises:

Physical channel mapper is used for the resource information that sends according to user's running time-frequency resource indicating device and will the transmitting users message bit stream be mapped in and sends to the transmission processor on the time-frequency plane;

Send processor, the user profile bit stream that is mapped on the time-frequency plane that is used for obtaining from physical channel mapper sends;

Receiving element comprises:

Receiving processor, be used to receive the user profile on the time-frequency plane of being mapped in of cellular radio Communication system transmission;

The physical channel de-mapping device, be used for to separate mapping from the user profile that is mapped on the time-frequency plane that receiving processor transmits, obtain the user profile bit stream according to the resource information that user's running time-frequency resource indicating device sends.

7, device as claimed in claim 6 is characterized in that, the basic frequency patterns indicating device in described sub-district is to the indicated frequency domain cyclic shift amount difference of carrying out the frequency domain cyclic shift in the sub-district that takies same frequency.

8, device as claimed in claim 6, it is characterized in that the reference time frequency pattern that described reference time frequency pattern maker generates is to generate by the segment of Costas sequence or Costas sequence or Costas sequence with through the segment combination of the Costas sequence of backward conversion or more than one Costas sequence with through the segment combination of the Costas sequence of backward conversion.

9, device as claimed in claim 6 is characterized in that, the basic frequency patterns rule in described generation sub-district is for to carry out the frequency domain cyclic shift to reference time frequency pattern.

10, device as claimed in claim 6 is characterized in that, the basic frequency patterns rule in described generation sub-district is for to carry out time-domain cyclic shift to the basic frequency patterns in sub-district.

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