CN103209485A - Resource distribution method and device for physical uplink shared channel - Google Patents

Abstract

A resource distribution method for a physical uplink shared channel is characterized by comprising the steps of enabling the physical uplink shared channel (PUSCH) of multi-subband user equipment (UE) to occupy symbols 4-8 of a subframe 2, a subframe 3 and a subframe 4; configuring PUSCH demodulation reference signals in the subframes by combining phase factors, and transmitting the PUSCH demodulation reference signals and data through the subframes. The invention further discloses a resource distribution device for the physical uplink shared channel. A high PAPR (peak to average power ratio) is avoided, and accordingly performance of a whole system is improved.

Description

A kind of resource allocation methods of Physical Uplink Shared Channel and device

Technical field

The present invention relates to communication technical field, more specifically, relate to a kind of resource allocation methods and device of Physical Uplink Shared Channel.

Background technology

Along with terminal to the improving constantly of rate requirement, national grid wireless communication system (power network) has been introduced many subbands business.Based on up many subbands business, terminal can realize high-rate services such as real time video collection, big data quantity data acquisition.It is basic fundamental that the national grid wireless communication system adopts orthogonal frequency division technique (OFDM), and each road carries a subband of effective information.A user (UE) can support the list band also can support many subbands to send and reception, and the UE that ability is the strongest can support the business of 40 subbands.

In this system, Physical Uplink Shared Channel (PUSCH) demodulation reference sequences length is determined by transmission bandwidth.When transmission bandwidth disposes less than 3 Resource Block (RB), adopted Quadrature Phase Shift Keying (QPSK) sequence.This sequence obtains by computer search, and purpose is to obtain constant coefficients and good their cross correlation in frequency domain, and can obtain abundant sequence number.When band width configuration during more than or equal to 3 RB, PUSCH demodulated reference signal basic sequence is constructed based on the ZC sequence extension.Cyclic shift by PUSCH demodulated reference signal basic sequence can obtain a plurality of reference signal sequences.The ZC sequence has constant amplitude, autocorrelation and cross correlation preferably, has the desired ideal characterisitics of PUSCH demodulated reference signal.

Because the PUSCH demodulated reference signal basic sequence of each subband of PUSCH is the repetition of list band reference sequences, this operation is equivalent to time domain interpolation.When each sub-carrier phase was identical or close, superposed signal just can be subjected to the modulation of identical initial phase signal, thereby produced bigger instantaneous power peak value, had higher peak-to-average force ratio (PAPR) thus, further caused the whole system performance to descend.

Summary of the invention

The embodiment of the invention proposes a kind of resource allocation methods of Physical Uplink Shared Channel, avoids higher PAPR, and then improves the performance of whole system.

The embodiment of the invention also proposes a kind of resource allocation device of Physical Uplink Shared Channel, avoids higher PAPR, and then improves the performance of whole system.

The technical scheme of the embodiment of the invention is as follows:

A kind of resource allocation methods of Physical Uplink Shared Channel, this method comprises:

The Physical Uplink Shared Channel PUSCH of many subbands user UE takies the symbol 4 to 8 of subframe 2, and subframe 3 and subframe 4;

In conjunction with phase factor the PUSCH demodulated reference signal is configured in the described subframe, by described subframe transmission PUSCH demodulated reference signal and data.

The described PUSCH demodulated reference signal being configured in the described subframe in conjunction with phase factor comprises:

The basic sequence of PUSCH demodulation reference sequences obtains the PUSCH demodulation reference sequences of respective sub-bands in conjunction with phase factor;

The PUSCH demodulation reference sequences of respective sub-bands is mapped on the subband of PUSCH demodulation reference mark correspondence;

Data after the mapping are carried out the inverse transformation IDFT processing that discrete fourier changes, and then increase Cyclic Prefix, obtain single carrier orthogonal frequency division SC-OFDM symbol;

The SC-OFDM symbol is configured in the described subframe.

The basic sequence of described PUSCH demodulation reference sequences comprises in conjunction with the PUSCH demodulation reference sequences that phase factor obtains respective sub-bands:

Generate the packet number of current PUSCH demodulated reference signal basic sequence;

Obtain ZC sequence root by described packet number, calculate the ZC sequence according to described ZC sequence root;

Calculate the basic sequence of PUSCH demodulation reference sequences according to described ZC sequence;

The basic sequence of PUSCH demodulation reference sequences obtains the PUSCH demodulation reference sequences of respective sub-bands in conjunction with phase factor.

Described phase factor is by reference signal basic sequence length

Determine with subband.

A kind of resource allocation device of Physical Uplink Shared Channel, described device comprises:

First module, for the symbol 4 to 8 that takies subframe 2, and subframe 3 and subframe 4;

Second module is used in conjunction with phase factor Physical Uplink Shared Channel PUSCH demodulated reference signal being configured in described subframe, by described subframe transmission PUSCH demodulated reference signal and data.

Described second module comprises:

The basic sequence generation unit is for the basic sequence that generates PUSCH demodulation reference sequences;

Cycle shift unit is for the PUSCH demodulation reference sequences that the basic sequence of PUSCH demodulation reference sequences is obtained respective sub-bands in conjunction with phase factor;

The resource map unit is for the subband that the PUSCH demodulation reference sequences of respective sub-bands is mapped to PUSCH demodulation reference mark correspondence;

The IDFT unit, the data after being used for shining upon are carried out the inverse transformation IDFT processing that discrete fourier changes, and then increase Cyclic Prefix, obtain single carrier orthogonal frequency division SC-OFDM symbol.

Described basic sequence generation unit comprises:

The sequence group number generates subelement, is used for generating the packet number of current PUSCH demodulated reference signal basic sequence;

ZC sequence root generates subelement, is used for obtaining ZC sequence root by described packet number;

The ZC sequence generates subelement, is used for calculating the ZC sequence according to ZC sequence root;

Basic sequence generates subelement, is used for being calculated by the ZC sequence basic sequence of PUSCH demodulation reference sequences.

Described device further comprises the 3rd module, is used for according to reference signal basic sequence length

Generate described phase factor and be sent to second module with subband.

As can be seen, in embodiments of the present invention, the PUSCH of many subbands UE takies the symbol 4 to 8 of subframe 2, and subframe 3 and subframe 4 from technique scheme; In conjunction with phase factor the PUSCH demodulated reference signal is configured in the described subframe, by described subframe transmission PUSCH demodulated reference signal and data.Owing to the PUSCH demodulated reference signal is configured in the subframe in conjunction with phase factor at each subband, therefore in the prior art that solves, causes higher PAPR owing to simple interpolations obtains close subcarrier, and then improved the performance of whole system.

Description of drawings

Fig. 1 is the resource allocation methods schematic flow sheet of embodiment of the invention PUSCH;

Fig. 2 is embodiment of the invention PUSCH channel architecture schematic diagram;

Fig. 3 is the resource allocation device structural representation of embodiment of the invention PUSCH;

Fig. 4 is the structural representation of the embodiment of the invention second module;

Fig. 5 is another structural representation of the embodiment of the invention second module;

Fig. 6 is the structural representation of embodiment of the invention basic sequence generation unit.

Embodiment

For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.

In embodiments of the present invention, each subband is configured in the PUSCH demodulated reference signal in the subframe in conjunction with phase factor, in the prior art of solution, causes higher PAPR owing to simple interpolations obtains close subcarrier, and then has improved the performance of whole system.No matter the list band still is many subbands mode of operation, only needs to generate one ZC basic sequence, greatly reduces the computation complexity of transmitting terminal and receiving terminal.

Be the resource allocation methods schematic flow sheet of PUSCH referring to accompanying drawing 1, specifically may further comprise the steps:

The PUSCH of step 101, many subbands UE takies the symbol 4 to 8 of subframe 2, and subframe 3 and subframe 4.

A subband comprises in frequency

Individual effective subcarrier comprises 9 SC-FDMA symbols in a radio frames of time domain.

The PUSCH configured bandwidth of subband UE more than one is

Individual subband accounts for symbol 4～8 and subframe 3 and the subframe 4 of subframe 2 on the time domain.Accompanying drawing 2 is PUSCH channel architecture schematic diagrames, and wherein, dark-shaded partly is the PUSCH demodulated reference signal, and other dash area is other data among the PUSCH.The frequency of the subband of PUSCH configuration can be continuous also can dispersing.

Step 102, in conjunction with phase factor the PUSCH demodulated reference signal is configured in the described subframe, by described subframe transmission PUSCH demodulated reference signal and data

In conjunction with phase factor the PUSCH demodulated reference signal is configured in the above-mentioned subframe, specifically comprises:

The basic sequence of step 1021, PUSCH demodulation reference sequences obtains the PUSCH demodulation reference sequences of respective sub-bands in conjunction with phase factor.

The phase factor that different subbands is corresponding different, the basic sequence of PUSCH demodulation reference sequences obtain the PUSCH demodulation reference sequences of subband correspondence in conjunction with the phase factor of respective sub-bands correspondence.

Wherein, the basic sequence of PUSCH demodulation reference sequences determines to comprise step a-c.

The packet number of step a, the current PUSCH demodulated reference signal basic sequence of generation.

Packet number u is definite by following formula,

$u=N_{\mathrm{ID}}^{\mathrm{cell}}\mathrm{mod}{M}_{\mathrm{sc}}^{\mathrm{RS}}---\left(1\right)$

Be reference signal basic sequence length,

Be residential quarter physical I D.

Step b, obtain ZC sequence root by described packet number, calculate the ZC sequence according to ZC sequence root.

ZC sequence root q produces according to following formula:

Be the ZC sequence length.

(2)

Calculate ZC sequence x _q(m) as shown in the formula:

$x_q\left(m\right)=e^{-j\frac{\mathrm{\&pi;qm}(m+1)}{N_{\mathrm{ZC}}^{\mathrm{RS}}}},0\&le;m<N_{\mathrm{ZC}}^{\mathrm{RS}}---\left(3\right)$

Step c, calculate the basic sequence of PUSCH demodulation reference sequences according to the ZC sequence

$\stackrel{\&OverBar;}{r_u}\left(n\right)=x_q\left(n\mathrm{mod}{N}_{\mathrm{ZC}}^{\mathrm{RS}}\right),0\&le;n<M_{\mathrm{sc}}^{\mathrm{RS}}---\left(4\right)$

Next describe phase factor in detail.

Subband i symbol K phase factor α be by Determine with subband i, concrete:

$\mathrm{\&alpha;}=2\mathrm{\&pi;}\mathrm{mod}(i,M_{\mathrm{sc}}^{\mathrm{RB}})/M_{\mathrm{sc}}^{\mathrm{RB}}---\left(5\right)$

The demodulated reference signal sequence r of PUSCH ^PUSCH() is defined as:

$r^{\mathrm{PUSCH}}(K\&CenterDot;M_{\mathrm{sc}}^{\mathrm{RS}}\&CenterDot;M_{\mathrm{RB}}^{\mathrm{PUSCH}}+i\&CenterDot;M_{\mathrm{sc}}^{\mathrm{RS}}+n)=r_u^{\left(a\right)}\left(n\right)---\left(6\right)$

Wherein $K=\mathrm{0,1},...,N_{\mathrm{RS}}^{\mathrm{PUSCH}}-1,$ $i=0,...,M_{\mathrm{RB}}^{\mathrm{PUSCH}}-1,$ $n=0,...,M_{\mathrm{sc}}^{\mathrm{RS}}-1;$ $N_{\mathrm{RS}}^{\mathrm{PUSCH}}$ It is PUSCH reference symbol number in the radio frames of a subband;

The sub band number that takies for PUSCH is by the PUSCH configured bandwidth of UE

Determine.

It is basic sequence

Cyclic shift,

$r_u^{\left(a\right)}\left(n\right)=e^{\mathrm{j\&alpha;n}}\stackrel{\&OverBar;}{r_u}\left(n\right),0\&le;n<M_{\mathrm{sc}}^{\mathrm{RS}}---\left(7\right)$

Step 1022, the PUSCH demodulation reference sequences of respective sub-bands is mapped on the subband of PUSCH demodulation reference mark correspondence.

Utilize prior art that the PUSCH demodulation reference sequences of respective sub-bands is mapped on the subband of PUSCH demodulation reference mark correspondence.

Data after step 1023, the mapping are carried out inverse transformation (IDFT) processing that discrete fourier changes, and then increase Cyclic Prefix, obtain single carrier orthogonal frequency division (SC-OFDM) symbol.

Data on symbol of mapping are carried out IDFT handle, and increase the SC-OFDM symbol that Cyclic Prefix obtains correspondence.Each subband can be distinguished parallel processing and obtain the SC-OFDM symbol, also can be the order serial process acquisition in regular turn SC-OFDM symbol according to subband.

Step 1024, the SC-OFDM symbol is configured in the described subframe

The SC-OFDM symbol that obtains is configured in the symbol 4 to 8 of subframe 2, and in subframe 3 and the subframe 4.

Describe the resource allocation device of PUSCH in detail below in conjunction with accompanying drawing 3.

The resource allocation device of PUSCH comprises first module 301 and second module 302.

First module 301, for the symbol 4 to 8 that is taken subframe 2 by the PUSCH of many subbands UE, and subframe 3 and subframe 4.

Second module 302 is used in conjunction with phase factor the PUSCH demodulated reference signal being configured in described subframe, by described subframe transmission PUSCH demodulated reference signal and data.

In addition, the resource allocation device of PUSCH also comprise the 3rd module 303,

The 3rd module 303 is used for generating basis

Generate described phase factor and be sent to second module 301.

Wherein, comprise referring to accompanying drawing 4, the second modules 302:

Basic sequence generation unit 3021 is for the basic sequence that generates PUSCH demodulation reference sequences;

Cycle shift unit 3022 is for the PUSCH demodulation reference sequences that the basic sequence of PUSCH demodulation reference sequences is obtained respective sub-bands in conjunction with phase factor;

Resource map unit 3023 is for the subband that the PUSCH demodulation reference sequences of respective sub-bands is mapped to PUSCH demodulation reference mark correspondence;

IDFT unit 3024, the data after being used for shining upon carry out IDFT to be handled, and then increases Cyclic Prefix, obtains the SC-OFDM symbol.

Owing to can adopt the device in the accompanying drawing 4 according to the order serial process acquisition in regular turn SC-OFDM symbol of subband; Also can distinguish parallel processing and obtain the SC-OFDM symbol, then adopt the device in the accompanying drawing 5.In the accompanying drawing 5, comprise a basic sequence generation unit, for M subband M cycle shift unit arranged then, M resource map unit and M IDFT unit.

Are structural representations of basic sequence generation unit referring to accompanying drawing 6, basic sequence generation unit 3021 comprises:

The sequence group number generates subelement 30211, is used for generating the packet number of current PUSCH demodulated reference signal basic sequence;

ZC sequence root generates subelement 30212, is used for obtaining ZC sequence root by described packet number;

The ZC sequence generates subelement 30213, is used for calculating the ZC sequence according to ZC sequence root;

Basic sequence generates subelement 30214, is used for being calculated by the ZC sequence basic sequence of PUSCH demodulation reference sequences.

The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. the resource allocation methods of a Physical Uplink Shared Channel is characterized in that, this method comprises:

The Physical Uplink Shared Channel PUSCH of many subbands user UE takies the symbol 4 to 8 of subframe 2, and subframe 3 and subframe 4;

In conjunction with phase factor the PUSCH demodulated reference signal is configured in the described subframe, by described subframe transmission PUSCH demodulated reference signal and data.

2. according to the resource allocation methods of the described Physical Uplink Shared Channel of claim 1, it is characterized in that the described PUSCH demodulated reference signal being configured in the described subframe in conjunction with phase factor comprises:

The basic sequence of PUSCH demodulation reference sequences obtains the PUSCH demodulation reference sequences of respective sub-bands in conjunction with phase factor;

The PUSCH demodulation reference sequences of respective sub-bands is mapped on the subband of PUSCH demodulation reference mark correspondence;

Data after the mapping are carried out the inverse transformation IDFT processing that discrete fourier changes, and then increase Cyclic Prefix, obtain single carrier orthogonal frequency division SC-OFDM symbol;

The SC-OFDM symbol is configured in the described subframe.

3. according to the resource allocation methods of the described Physical Uplink Shared Channel of claim 2, it is characterized in that the basic sequence of described PUSCH demodulation reference sequences comprises in conjunction with the PUSCH demodulation reference sequences that phase factor obtains respective sub-bands:

Generate the packet number of current PUSCH demodulated reference signal basic sequence;

Obtain ZC sequence root by described packet number, calculate the ZC sequence according to described ZC sequence root;

Calculate the basic sequence of PUSCH demodulation reference sequences according to described ZC sequence;

The basic sequence of PUSCH demodulation reference sequences obtains the PUSCH demodulation reference sequences of respective sub-bands in conjunction with phase factor.

4. according to the resource allocation methods of the described Physical Uplink Shared Channel of claim 1, it is characterized in that described phase factor is by reference signal basic sequence length

Determine with subband.

5. the resource allocation device of a Physical Uplink Shared Channel is characterized in that, described device comprises:

First module, for the symbol 4 to 8 that takies subframe 2, and subframe 3 and subframe 4;

Second module is used in conjunction with phase factor Physical Uplink Shared Channel PUSCH demodulated reference signal being configured in described subframe, by described subframe transmission PUSCH demodulated reference signal and data.

6. according to the resource allocation device of the described Physical Uplink Shared Channel of claim 5, it is characterized in that described second module comprises:

The basic sequence generation unit is for the basic sequence that generates PUSCH demodulation reference sequences;

Cycle shift unit is for the PUSCH demodulation reference sequences that the basic sequence of PUSCH demodulation reference sequences is obtained respective sub-bands in conjunction with phase factor;

The resource map unit is for the subband that the PUSCH demodulation reference sequences of respective sub-bands is mapped to PUSCH demodulation reference mark correspondence;

The IDFT unit, the data after being used for shining upon are carried out the inverse transformation IDFT processing that discrete fourier changes, and then increase Cyclic Prefix, obtain single carrier orthogonal frequency division SC-OFDM symbol.

7. according to the resource allocation device of the described Physical Uplink Shared Channel of claim 6, it is characterized in that described basic sequence generation unit comprises:

The sequence group number generates subelement, is used for generating the packet number of current PUSCH demodulated reference signal basic sequence;

ZC sequence root generates subelement, is used for obtaining ZC sequence root by described packet number;

The ZC sequence generates subelement, is used for calculating the ZC sequence according to ZC sequence root;

Basic sequence generates subelement, is used for being calculated by the ZC sequence basic sequence of PUSCH demodulation reference sequences.

8. according to the resource allocation device of the described Physical Uplink Shared Channel of claim 6, it is characterized in that described device further comprises the 3rd module, be used for according to reference signal basic sequence length

Generate described phase factor and be sent to second module with subband.

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