CN107294896A

CN107294896A - Subframe processing method and processing device

Info

Publication number: CN107294896A
Application number: CN201610204299.1A
Authority: CN
Inventors: 徐汉青
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-04-01
Filing date: 2016-04-01
Publication date: 2017-10-24

Abstract

The invention provides a kind of subframe processing method and processing device, wherein, this method includes：MBSFN uses longer CP, it have modified MBSFN sub-frame type or frame format, define or have modified MBSFN reference signals simultaneously, the problem of bigger area of how between the base stations spacing or rural area progress MBSFN transmission is solved, user terminal UE is realized and carries out channel estimation to receive PMCH using MBSFN.

Description

Subframe processing method and processing device

Technical field

The present invention relates to the communications field, in particular to a kind of subframe processing method and processing device.

Background technology

OFDM (Orthogonal Frequency Division Multiplexing, referred to as OFDM) technology can be effective Overcome the interference problem of itself on frequency domain, but can not overcome due to the intersymbol interference (Inter-Symbol that multidiameter delay is caused Interference, referred to as ISI) and sub-carrier orthogonality destruction problem.Multidiameter delay shows as signal and sent out after wireless channel Raw relatively long time delay and amplitude fading.In this regard, in LTE system, cyclic prefix CP is added before each ofdm symbol (Cyclic Prefix).As long as the multidiameter delay in each footpath is no more than CP length with timing error sum, it is ensured that receiver is integrated The integer waveform of each subcarrier for including under each footpath in interval, so that between eliminating the intersymbol interference and subcarrier that multipath brings Disturb (Inter-Carrier Interference, referred to as ICI).

Before specific CP length is discussed, several chronomeres in LTE are recalled first.It is accurate in order to provide unanimously True timing, the different time interval defined in the LTE wireless access specifications, these time intervals are basic time unit (T_s=1/ (15000 × 2048), about 32.552us) multiple.One radio frames duration can be defined as T_f=307200 × T_s=10ms. One subframe duration can be defined as T_f=30720 × T_s=1ms.One time slot duration can be defined as T_slot=15360 × T_s=0.5ms. I.e. 1 radio frames include 10 subframes or 20 time slots.

There are 7 OFDM symbols in corresponding 1 time slot of normal CP.The CP length of 1st OFDM symbol is 5.21 μ s (160·T_s), the CP length of the 2nd to the 7th OFDM symbol is 4.69 μ s (144T_s).Normal CP can be in 1.4km Delay spread in the range of anti-multipath protective capability is provided, be suitable for urban district, suburb, rural area and radius of society less than 5km Mountain area environment.

There are 6 OFDM symbols in corresponding 1 time slot of extension CP, extension CP length is 16.67 μ s (512T_s) for Multicast single frequency network (Multicast-Broadcast Single Frequency Network, referred to as MBSFN) subframe, it is preceding Face uni-cast portion has 1-2 symbol to use normal CP).Extension CP can provide anti-many in the range of 5km delay spread Footpath protective capability, is suitable for mountain area environment of the coverage distance more than 5km and needs the rings such as the sea and desert of overlength distance covering Border.

A kind of subcarrier spacing Δ f of shortening is also defined in addition to 15kHz subcarrier spacings, in LTE_low=7.5kHz, it two Times length is equal to the duration of an OFDM symbol.This subcarrier spacing shortened is passed for the multicast and broadcast based on MBSFN Defeated and (the existing only in downlink transfer, uplink is no) specially designed.Corresponding CP length is 33.33us (1024T_s)。 LTE specification does not fully achieve 7.5kHz subcarrier spacing, and (no signaling do not indicate to use this pattern to define, therefore not Can realize), at least to Rel-10 versions, LTE only complete support 15kHz subcarrier spacing.

For the bigger area of spacing between the base stations (inter-site distance, such as 15km or bigger) or rural area (room Internal loss is smaller or receives the antenna of TV signal and is often distributed among outdoor or roof), it is necessary to which longer CP supports MBSFNs.

For in correlation technique, the problem of how between the base stations bigger area of spacing or rural area carry out MBSFN transmission, There is presently no effective solution.

The content of the invention

The invention provides a kind of subframe processing method and processing device, how between the base stations at least to solve in correlation technique, spacing is more The problem of big area or rural area carry out MBSFN transmission.

According to an aspect of the invention, there is provided a kind of subframe processing method, including：

Subframe is sent, wherein, the length of the cyclic prefix CP of the subframe is more than or equal to 1024 T_s, T_s=1/ (15000 × 2048) S。

Further, the length of the CP is one below：1536·T_s, 1792T_s, 2048T_s, 3584T_s, 4096T_s, 7168·T_s。

Further, the subframe is without unicast unicast control sections and/or without cell reference signals CRS.

Further, the structure of the subframe is configured at least one of：

Subcarrier spacing is 15kHz, and the symbolic number of each subframe is 10, and unicast unicast parts OFDM symbol number is 0 Individual, the CP length is 1024 T_s, each PRB sub-carrier number is 12；

Subcarrier spacing is 15kHz, and the symbolic number of each subframe is 8, and unicast unicast parts OFDM symbol number is 0, The CP length is 1792 T_s, each PRB sub-carrier number is 12；

Subcarrier spacing is 7.5kHz, and the symbolic number of each subframe is 4, and unicast unicast parts OFDM symbol number is 0 Individual, the CP length is 3584 T_s, each PRB sub-carrier number is 24；

Subcarrier spacing is 5.0kHz, and the symbolic number of each subframe is 4, and unicast unicast parts OFDM symbol number is 0 Individual, the CP length is 1536 T_s, each PRB sub-carrier number is 36；

Subcarrier spacing is 3.5kHz, and the symbolic number of each subframe is 2, and unicast unicast parts OFDM symbol number is 0 Individual, the CP length is 7168 T_s, each PRB sub-carrier number is 48；

Subcarrier spacing is 15kHz, and the symbolic number of each subframe is 10, first 1 or preceding 2 OFDM of the subframe Symbol is unicast unicast parts, and the CP length is 1024 T_s, each PRB sub-carrier number is 12；

Subcarrier spacing is 15kHz, and the symbolic number of each subframe is 8, first 1 or preceding 2 OFDM symbol of the subframe Number be unicast unicast parts, the CP length be 1024 T_s, each PRB sub-carrier number is 12.

Further, in the case where the subframe is multicast single frequency network MBSFN sub-frame, the multicast list is sent During frequency network MBSFN sub-frame, methods described also includes：

The MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the MBSFN RS's Time domain density or time domain pattern, or, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is changed, And the time domain density or time domain pattern of the MBSFN RS are changed,

Wherein, the time domain density of the modification MBSFN RS or the mode of time domain pattern include at least one of：Each The number of symbols that MBSFN RS are sent in the subframe is less than on 3, the predetermined symbol in each subframe described in transmission MBSFN RS；The number of symbols that MBSFN RS are sent in each subframe is equal to 3, default in each subframe The MBSFN RS, the MBSFN reference signals RS of the modification subframe frequency domain density or frequency domain figure are sent on symbol Sample includes：Sending on the corresponding frequency domain of the single OFDM symbols of MBSFN RS, each PRB insertions are more than 6 RS.

Further, sent on distinct symbols the MBSFN RS pattern is identical or frequency displacement preset number RE.

Further, it is 15kHz in subcarrier spacing, the symbolic number of each subframe is 8, and the CP length is 1792 T_s's In the case of, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the MBSFN RS Time domain density or time domain pattern include：The frequency domain density of the MBSFN RS is that every 2 subcarriers are inserted described in 1 MBSFN RS, the time domain density is to have 2 or 3 OFDM symbols to send MBSFN RS in each subframe.

Further, it is 7.5kHz in subcarrier spacing, the symbolic number of each subframe is 5, and the CP length is 2048 T_s In the case of, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the MBSFN RS Time domain density or time domain pattern include：The frequency domain density of the MBSFN RS is that every 4 subcarriers are inserted described in one MBSFN RS, the time domain density is to have 2 in each subframe or 3 OFDM symbols send MBSFN RS, or Person, the MBSFN reference signals RS of the modification subframe frequency domain density or frequency domain pattern include：Sending MBSFN RS On the corresponding frequency domain of single OFDM symbol, each PRB inserts 8 or 12 RS.

Further, it is 7.5kHz in subcarrier spacing, the symbolic number of each subframe is 4, and the CP length is 3584 T_s In the case of, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the MBSFN RS Time domain density or time domain pattern include：The frequency domain density of the MBSFN RS is that every 4 subcarriers are inserted described in 1 MBSFN RS, the time domain density is to have 2 in each subframe or 3 OFDM symbols send MBSFN RS, or Person, the MBSFN reference signals RS of the modification subframe frequency domain density or frequency domain pattern include：Sending MBSFN RS On the corresponding frequency domain of single OFDM symbol, each PRB inserts 8 or 12 RS.

Further, it is 5kHz in subcarrier spacing, the symbolic number of each subframe is 4, and the CP length is 1536 T_s's In the case of, the MBSFN reference signals RS of the subframe frequency domain density or frequency domain pattern are changed, and change the MBSFN RS Time domain density or time domain pattern include one below：

Every 6 subcarriers of the frequency domain density of the MBSFN RS insert 1 MBSFN RS, the time domain density To there is 1 or 2 or 3 OFDM symbols to send MBSFN RS in each subframe；

Sending on the corresponding frequency domain of the single OFDM symbols of MBSFN RS, the frequency domain density is each PRB insertions RS number of subcarriers is more than 6, the time domain density be the symbolic number that each subframe sends MBSFN RS be 1 or 2 or 3。

According to another aspect of the present invention, a kind of subframe processing unit is additionally provided, including：

Sending module, for sending subframe, wherein, the length of the cyclic prefix CP of the subframe is more than or equal to 1024 T_s, T_s=1/ (15000 × 2048) S.

Further, the structure of the subframe is configured at least one of：

Further, during sending subframe, described device also includes：

Further, it is 7.5kHz in subcarrier spacing, the symbolic number of each subframe is 5, and the CP length is 2048 T_s In the case of, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the MBSFN RS Time domain density or time domain pattern include：The frequency domain density of the MBSFN RS is that every 4 subcarriers are inserted described in one MBSFN RS, the time domain density is to have 2 in each subframe or 3 OFDM symbols send MBSFN RS, or Person, the MBSFN reference signals RS of the modification subframe frequency domain density or frequency domain pattern are included in transmission MBSFN RS On the corresponding frequency domain of single OFDM symbol, each PRB inserts 8 or 12 RS.

By the present invention, MBSFN uses longer CP, have modified MBSFN sub-frame type or frame format, at the same definition or MBSFN reference signals are have modified, the bigger area of how between the base stations spacing is solved or rural area carries out MBSFN biographies Defeated the problem of, realize user terminal UE and carry out channel estimation to receive PMCH using MBSFN.

Brief description of the drawings

Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, of the invention shows Meaning property embodiment and its illustrate be used for explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：

Fig. 1 is a kind of flow chart of subframe processing method according to embodiments of the present invention；

Fig. 2 is a kind of structured flowchart of subframe processing unit according to embodiments of the present invention；

Fig. 3 is the schematic diagram of subcarrier spacing Δ f=15kHz according to the preferred embodiment of the invention MBSFN RS resource impacts；

Fig. 4 is the signal of subcarrier spacing Δ f=7.5kHz according to the preferred embodiment of the invention MBSFN RS resource impacts Figure one；

Fig. 5 is the signal of subcarrier spacing Δ f=7.5kHz according to the preferred embodiment of the invention MBSFN RS resource impacts Figure two；

Fig. 6 is the schematic diagram of subcarrier spacing Δ f=5kHz according to the preferred embodiment of the invention MBSFN RS resource impacts One；

Fig. 7 is the schematic diagram of subcarrier spacing Δ f=5kHz according to the preferred embodiment of the invention MBSFN RS resource impacts Two；

Fig. 8 is the schematic diagram of subcarrier spacing Δ f=5kHz according to the preferred embodiment of the invention MBSFN RS resource impacts Three.

Embodiment

Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that in the case where not conflicting, The feature in embodiment and embodiment in the application can be mutually combined.

It should be noted that term " first ", " second " in description and claims of this specification and above-mentioned accompanying drawing etc. is to use In distinguishing similar object, without for describing specific order or precedence.

A kind of subframe processing method is provided in the present embodiment, and Fig. 1 is a kind of subframe processing method according to embodiments of the present invention Flow chart, as shown in figure 1, the flow comprises the following steps：

Step S102, sets the CP of subframe length to be more than or equal to 1024Ts, T_s=1/ (15000 × 2048) S；

Step S104, sends the subframe.

In an embodiment of the present invention, the length of the CP is one below：1536·T_s, 1792T_s, 2048T_s, 3584T_s, 4096·T_s, 7168T_s。

In an embodiment of the present invention, the subframe is without unicast unicast control sections and/or without cell reference signals CRS.

In an embodiment of the present invention, the structure of the subframe is configured at least one of：

Subcarrier spacing is 15kHz, and the symbolic number of each subframe is 10, first 1 or preceding 2 OFDM symbol of the subframe Number be unicast unicast parts, the CP length be 1024 T_s, each PRB sub-carrier number is 12；

Subcarrier spacing is 15kHz, and the symbolic number of each subframe is 8, first 1 or preceding 2 OFDM symbols of the subframe For unicast unicast parts, the CP length is 1024 T_s, each PRB sub-carrier number is 12.

In an embodiment of the present invention, in the case where the subframe is multicast single frequency network MBSFN sub-frame, the multicast is sent During multicast single-frequency network network MBSFN sub-frame, this method also includes：

The MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the time domain of the MBSFN RS Density or time domain pattern, or, the MBSFN reference signals RS of the subframe frequency domain density or frequency domain pattern are changed, and repair Change the time domain density or time domain pattern of the MBSFN RS,

Wherein, modification MBSFN RS time domain density or the mode of time domain pattern include at least one of：Each son MBSFN RS number of symbols is sent on frame less than 3, the MBSFN RS are sent on the predetermined symbol in each subframe； MBSFN RS number of symbols is sent in each subframe equal to 3, being sent on the predetermined symbol in each subframe should MBSFN RS, the MBSFN reference signals RS of the modification subframe frequency domain density or frequency domain pattern include：Sending On the corresponding frequency domain of the single OFDM symbols of MBSFN RS, each PRB insertions are more than 6 RS.

In an embodiment of the present invention, sent on distinct symbols the MBSFN RS pattern is identical or frequency displacement preset number RE.

In an embodiment of the present invention, it is 15kHz in subcarrier spacing, the symbolic number of each subframe is 8, and the CP length is 1792 T_sIn the case of, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the MBSFN RS time domain density or time domain pattern includes：The frequency domain density of the MBSFN RS is that every 2 subcarriers insertion 1 should MBSFN RS, the time domain density is to have 2 or 3 OFDM symbols to send MBSFN RS in each subframe.

In an embodiment of the present invention, it is 7.5kHz in subcarrier spacing, the symbolic number of each subframe is 5, the CP length For 2048 T_sIn the case of, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, and modification should MBSFN RS time domain density or time domain pattern includes：The frequency domain density of the MBSFN RS is every 4 subcarriers insertion one The individual MBSFN RS, the time domain density is to have 2 in each subframe or 3 OFDM symbols send MBSFN RS, or Person, the MBSFN reference signals RS of the modification subframe frequency domain density or frequency domain pattern include：Sending MBSFN RS On the corresponding frequency domain of single OFDM symbol, each PRB inserts 8 or 12 RS.

In an embodiment of the present invention, it is 7.5kHz in subcarrier spacing, the symbolic number of each subframe is 4, the CP length For 3584 T_sIn the case of, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, and modification should MBSFN RS time domain density or time domain pattern includes：The frequency domain density of the MBSFN RS is every 4 subcarriers insertion 1 The individual MBSFN RS, the time domain density is to have 2 in each subframe or 3 OFDM symbols send MBSFN RS, or Person, the MBSFN reference signals RS of the modification subframe frequency domain density or frequency domain pattern include：Sending MBSFN RS On the corresponding frequency domain of single OFDM symbol, each PRB inserts 8 or 12 RS.

In an embodiment of the present invention, it is 5kHz in subcarrier spacing, the symbolic number of each subframe is 4, and the CP length is 1536 T_sIn the case of, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is changed, and modification should MBSFN RS time domain density or time domain pattern includes one below：

Every 6 subcarriers of the frequency domain density of the MBSFN RS insert 1 MBSFN RS, and the time domain density is somebody's turn to do to be each There is 1 or 2 or 3 OFDM symbols transmission MBSFN RS in subframe；

Sending on the corresponding frequency domain of the single OFDM symbols of MBSFN RS, the frequency domain density is each PRB insertions RS Number of subcarriers is more than 6, and the time domain density is that the symbolic number that each subframe sends MBSFN RS is 1 or 2 or 3.

A kind of subframe processing unit is additionally provided in the present embodiment, and the device is used to realize above-described embodiment and preferred embodiment, Repeating no more for explanation was carried out.As used below, term " module " can realize predetermined function software and/or The combination of hardware.Although the device described by following examples is preferably realized with software, hardware, or software and hard The realization of the combination of part is also that may and be contemplated.

Fig. 2 is a kind of structured flowchart of subframe processing unit according to embodiments of the present invention, as shown in Fig. 2 the device includes：

Setup module 22, for setting the CP length of subframe to be more than or equal to 33.33us, T_s=1/ (15000 × 2048) S；

Sending module 24, for sending the subframe.

In an embodiment of the present invention, in the case where the subframe is multicast single frequency network MBSFN sub-frame, the multicast is sent During multicast single-frequency network network MBSFN sub-frame, the device also includes：

In an embodiment of the present invention, it is 7.5kHz in subcarrier spacing, the symbolic number of each subframe is 5, the CP length For 2048 T_sIn the case of, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, and modification should MBSFN RS time domain density or time domain pattern includes：The frequency domain density of the MBSFN RS is every 4 subcarriers insertion one The individual MBSFN RS, the time domain density is to have 2 in each subframe or 3 OFDM symbols send MBSFN RS, or Person, it is mono- that the MBSFN reference signals RS of the modification subframe frequency domain density or frequency domain pattern are included in transmission MBSFN RS On the corresponding frequency domain of individual OFDM symbol, each PRB inserts 8 or 12 RS.

With reference to preferred embodiment and embodiment, the present invention is described in detail.

The subframe structure design of longer CP (being more than or equal to 33.33us)

In OFDM technology, sample frequency f_sFFT length N is multiplied by equal to subcarrier spacing Δ f_FFT, i.e.,

f_s=Δ fN_FFT

Here f_sDiffer and be set to above-mentioned T_s(T_s=1/ (15000 × 2048)) inverse, be specifically dependent upon subcarrier spacing and FFT Length.For example, as Δ f=15kHz and N_FFTWhen=2048, f_sFor T_sInverse.

Significant character length T_symb(being not added with CP durations) is equal to FFT length N_FFTDivided by sample frequency f_s, or equal to subcarrier Interval delta f inverse, i.e.,

T_symb=N_FFT/f_s=1/ Δ f

According to the duration and above-mentioned OFDM parameters relation of subframe or time slot, whether reserved uni-cast portion, we can be with Following subframe type or subframe structure (Index 0 and Index 4 are existing MBSFN sub-frame structure) are designed, as shown in table 1.

It should be noted that long CP designed in table 1 subframe structure can be not only used for MBSFN scenes, it may also be used for Other application radio communication scene, such as long-distance transmissions or the scene with high temporal dispersion characteristics.For the ease of description, The present invention is described using MBSFN scenes as one of following subframe structures typical case's application.

Table 1

MBSFN subframe structure can be divided into it is above-mentioned a variety of,

Index 0 and Index 4 configures for existing MBSFN sub-frame, and subcarrier spacing is respectively 15kHz and 7.5kHz, MBSFN The corresponding CP length in part is respectively 16.67us (512T_s) and 33.33us (1024T_s).Symbolic number point in each subframe Wei 12 and 6.

According to different demands, we design corresponding MBSFN sub-frame structure.Here, we set PRB frequency domain Width is 180kHz, and the symbol hereinafter referred to is all defaulted as descending OFDM symbol.

From longer CP (be more than or equal to 33.33us), without unicast control sections/and without these starting points of CRS, preferred upper table Index 2, Index 3, Index 6, Index 7, Index 10, the secondary Index 5 chosen in table, the Index 8, (Index of Index 9 5/8/9 subframe structure is all that each subframe includes odd number symbolic construction, it is necessary to be defined again to time slot, therefore is time choosing).

It is preferred that MBSFN sub-frame structure be specially (correspondence Index 2, Index 3, Index 6, Index 7, Index 10)：

Subcarrier spacing is 15kHz, and the sub-carrier number in each RB is that the symbolic number in 12, each subframe is 10, CP length For 1024T_sUni-cast portion OFDM symbol number in (about 33.33us), subframe is 0；And/or,

Subcarrier spacing is 15kHz, and the sub-carrier number in each RB is that the symbolic number in 12, each subframe is 8, CP length For 1792T_sUni-cast portion OFDM symbol number in (about 58.33us), subframe is 0；And/or,

Subcarrier spacing is 7.5kHz, and the sub-carrier number in each RB is that the symbolic number in 24, each subframe is 4, CP length For 3584T_sUni-cast portion OFDM symbol number in (about 116.67us), subframe is 0；And/or,

Subcarrier spacing is 5kHz, and the sub-carrier number in each RB is that the symbolic number in 36, each subframe is for 4, CP length 1536·T_sUni-cast portion OFDM symbol number in (about 50.00us), subframe is 0；And/or,

Subcarrier spacing is 3.5kHz, and the sub-carrier number in each RB is that the symbolic number in 48, each subframe is 2, CP length For 7168T_sUni-cast portion OFDM symbol number in (about 233.33us), subframe is 0；

Long CP disclosure satisfy that bigger station spacing scene and the MBMS service transmission demand of rural area, while without uni-cast portion MBSFN sub-frame structure reduce expense (especially for long OFDM symbol and long CP structure), above-mentioned MBSFN Subframe structure (the MBSFN sub-frame structure for including preferred and time choosing) disclosure satisfy that these requirements.

There is uni-cast portion in MBSFN sub-frame, available for measuring or to the support of up transmission (as permitted for up offer scheduling Can, HARQ confirms and power control command etc.), therefore from longer CP (being more than 33.33us), exist unicast parts, Subcarrier spacing these starting points compatible with prior art, the corresponding subframe knot of Index 2A, Index 3A preferably in upper table Structure.For other the non-15kHz corresponding subframe structure of subcarrier spacing type, 1 or more is reserved before subframe Symbol is sent for unicast, and also the transmission with existing downlink unicast signals or channel is incompatible.Need to change or redefine unicast Signal or channel are sent, therefore other in table 1 include the subframe structure of uni-cast portion (not including existing subframe structure Index 0) For secondary choosing, such as Index 4A or Index5A or Index 6A or Index 7A or Index 8A or Index 9A or Index 10A。

It is preferred that MBSFN sub-frame structure be specially (correspondence Index 2A, Index 3A)：

Subcarrier spacing is 15kHz, and the sub-carrier number in each RB is 12, during the symbolic number in each subframe is 10, subframe First 1 or preceding 1~2 OFDM symbol be unicast symbols, for sending CRS and/or other downstream signals or channel. The corresponding CP length in MBSFN parts is 1024T_s(about 33.33us).And/or,

Subcarrier spacing is 15kHz, and the sub-carrier number in each RB is 12, during the symbolic number in each subframe is 8, subframe First 1 or preceding 1~2 OFDM symbol are unicast symbols, for sending CRS and/or other downstream signals or channel.MBSFN The corresponding CP length in part is 1792T_s(about 58.33us).

In addition, though length is 1024T_sCP had been defined in existing standard, but it is corresponding is subcarrier spacing be 7.5kHz Subframe structure, this subframe structure do not have uni-cast portion.Although above-mentioned new subframe structure Index2A CP length be similarly 1024·T_s, but new subframe structure can include uni-cast portion.

It is preferred that CP types (be more than or equal to 33.33us)

The CP that above-mentioned MBSFN sub-frame structure is related to can include following all kinds of：

Type 0 (conventional CP, 144T_sor 160·T_s, corresponded to 4.69us or 5.21us, 3GPP Rel-13 agreements respectively It is defined)

Type 1 (extension CP, 512T_s, 16.67us is corresponded to, 3GPP Rel-13 agreements have been defined)

Type 2 (longer CP, 1024T_s, 33.33us is corresponded to, 3GPP Rel-13 agreements have been defined.But the CP exists Corresponding subframe type can be different from the subframe type of prior art in this programme.)

Type 3 (longer CP, 1536T_s, 50.00us is corresponded to, 3GPP existing protocols are also undefined)

Type 4 (longer CP, 1792T_s, 58.33us is corresponded to, 3GPP existing protocols are also undefined)

Type 5 (longer CP, 2048T_s, 66.67us is corresponded to, 3GPP existing protocols are also undefined)

Type 6 (longer CP, 3584T_s, 116.67us is corresponded to, 3GPP existing protocols are also undefined)

Type 7 (longer CP, 4096T_s, 133.33us is corresponded to, 3GPP existing protocols are also undefined)

Type 8 (longer CP, 7168T_s, 233.33us is corresponded to, 3GPP existing protocols are also undefined)

The problem of MBSFN transmission being carried out in the bigger area of spacing between solving base station or rural area, the design of this preferred embodiment CP include it is at least one following：Type2、Type3、Type4、Type5、Type6、Type7、Type8.According to above-mentioned It is preferred that subframe structure, preferred one of Type2, Type3, Type4, Type6, Type8 or a variety of CP types.Wherein, With the CP of existing protocol equal length, the new subframe knot different from the subframe structure that existing protocol is defined is applied in this programme In structure.

MBSFN reference signal designs

It is existing MBSFN RS design below：

MBSFN RS formation sequenceFor：

Wherein n_sFor the slot index in a radio frames, l is the OFDM symbol sequence number in a time slot, pseudo-random sequence c (i) Defined in the section of 3GPP agreements 36.211 7.2.The pseudo random sequence generator that each OFDM symbol starts is initialized as

OFDM symbol l reference signal sequence needs to be mapped to complex modulation signal according to following formulaOn (port p=4),

Wherein

For subframe structure new MBSFN, it is necessary to redesign or change existing MBSFN RS formation sequence and/or time-frequency Resource impact pattern.

Modification keeps MBSFN RS frequency domain density or frequency domain pattern constant；Change MBSFN RS time domain density or time domain Pattern, to match new MBSFN sub-frame structure.

The pattern that MBSFN RS are sent on distinct symbols can be with identical or frequency displacement preset number RE.It is preferred that, preset number etc. In the half of MBSFN RS frequency domain density.It is preferred that, send MBSFN RS figures on MBSFN RS odd number symbol Sample is identical, and MBSFN RS patterns are identical on even number symbol, MBSFN RS patterns on odd number and even number symbol Frequency displacement preset number RE.

MBSFN RS frequency domain density can be defined as on frequency domain inserting a MBSFN RS every several RE.According to son Carrier wave interval is sized difference, and RE's is of different sizes.

MBSFN RS time domain density can be defined as in time domain inserting a MBSFN RS every several OFDM symbols. According to the difference that is sized of subcarrier spacing, the duration of OFDM symbol is different.

Embodiment one

MBSFN sub-frame structure corresponding for Index3 and/or Index3A, namely subcarrier are 15kHz (each PRB bags Include 12 subcarriers), it is 8 to design OFDM symbol number in each subframe, and corresponding CP length is 1792T_s(about 58.33us), MBSFN RS can be designed as follows：

Method one：Every 2 subcarriers insert each subframe (8 OFDM symbols) in a MBSFN RS, time domain on frequency domain In have 2 or 3 OFDM symbols send MBSFN RS.

In the related art, every 4 OFDM symbols are inserted in one MBSFN RS of every 2 subcarriers insertion, time domain on frequency domain Enter 1 row MBSFN RS.Each PRB pair (2 PRB) inserts 18 RS altogether.

In the method, MBSFN RS sequences generating mode is constant, pseudo random sequence generator initialization mode is constant. MBSFN RS frequency domain density or frequency domain pattern is constant, but modification MBSFN RS time domain density or time domain pattern. MBSFN RS time domain density or time domain pattern modification has two ways：The first：Reduce and MBSFN RS are sent in each subframe Number of symbols, such as only 2 symbols send MBSFN RS in each subframe, while which is redesigned in each subframe MBSFN RS are sent on a little symbols；Second：The number of symbols that MBSFN RS are sent in each subframe is constant, each subframe Upper transmission MBSFN RS number of symbols is still 3, but also needs to redesign to send MBSFN RS on which symbol in subframe；

In the method, it is necessary to which time-frequency domain density or pattern to MBSFN RS are modified.Wherein, MBSFN RS frequency Domain density still keeps every 2 subcarriers to insert a MBSFN RS.Time domain density is arranged per 2-3 OFDM symbol insertion 1 MBSFN RS, it is preferred that each subframe transmission MBSFN RS symbolic number remains as 3 in time domain.

MBSFN RS (numbering of the symbol serial number symbol in subframe) are sent on following symbol that specifically can be in each subframe：

(symbol 0, symbol 2, symbol 4),

Or (symbol 0, symbol 2, symbol 5),

Or (symbol 0, symbol 2, symbol 6),

Or (symbol 0, symbol 3, symbol 5),

Or (symbol 0, symbol 3, symbol 6),

Or (symbol 1, symbol 3, symbol 5),

Or (symbol 1, symbol 3, symbol 6),

Or (symbol 1, symbol 3, symbol 7),

Or (symbol 1, symbol 4, symbol 6),

Or (symbol 1, symbol 4, symbol 7),

Or (symbol 2, symbol 4, symbol 6),

Or (symbol 2, symbol 4, symbol 7),

Or (symbol 2, symbol 5, symbol 7),

Or (symbol 3, symbol 5, symbol 7).

Because the merging of MBSFN multipaths area considerably increases the complexity of multipath, the frequency selectivity of MBSFN signals is far longer than Unicast signal, thus need bigger RS time-frequency domain density.As above design considers the accurate of MBSFN RS channel estimation Property, eliminate the possibility sending method of some influence channel estimations.

It is preferred that, selection is in (symbol 1, symbol 4, symbol 6), (symbol 1, symbol 4, symbol 7) or (symbol 2, symbol Number 4, symbol 6) or (symbol 2, symbol 4, symbol 7) on send MBSFN RS, reason is the 1st of MBSFN Or preceding 2 symbols can be reserved for unicast transmission, such as subframe structure for Index 3A.

The pattern that MBSFN RS are sent on distinct symbols can be with identical or frequency displacement preset number RE.It is preferred that, preset number etc. In the half of MBSFN RS frequency domain density.It is preferred that, send MBSFN RS figures on MBSFN RS odd number symbol Sample is identical, and MBSFN RS patterns are identical on even number symbol, MBSFN RS patterns on odd number and even number symbol Frequency displacement preset number RE.By taking this method as an example, MBSFN RS frequency domains density is equal to 2 RE.Above-mentioned transmission MBSFN RS Three symbols in first, the two and second transmission MBSFN pattern identical with the 3rd transmission MBSFN pattern 1 RE of frequency displacement.

With exemplified by sending MBSFN RS on (symbol 1, symbol 4, symbol 6) (numbering in correspondence time slot be (symbol 1, Symbol 0, symbol 2)),

Wherein

Fig. 3 is the schematic diagram of subcarrier spacing Δ f=15kHz according to the preferred embodiment of the invention MBSFN RS resource impacts, As shown in figure 3, each subframe includes 8 OFDM symbols.R_pRepresent is used for reference signal RS biographies on antenna port p Defeated resource element.

Method two, modification MBSFN RS frequency domain density or frequency domain pattern；Change MBSFN RS time domain density or time-domain diagram Sample.

No longer it is that every 2 subcarriers insert MBSFN RS, MBSFN RS time domain pattern and are also required to according to new on frequency domain Subframe structure modify.The initialization mode of pseudo random sequence generator is constant, but MBSFN RS sequence generating modes Need accordingly to be changed according to frequency domain pattern, for example, sending on the corresponding frequency domain of MBSFN RS OFDM symbols, each PRB is not inserted into 6 RS (in 3GPP 36.211), but insertion 5 or other numbers RS. MBSFN RS time domain density or time domain pattern modification has two ways：The first：Reduce and MBSFN RS are sent in each subframe Number of symbols, redesign and send MBSFN RS on which symbol in each subframe；Second：Sent in each subframe MBSFN RS number of symbols is constant, and the number of symbols that MBSFN RS are sent in each subframe is still 3, but also needs to set again Meter sends MBSFN RS in each subframe on which symbol；

Embodiment two

MBSFN sub-frame structure corresponding for Index 5 and/or Index 5A, namely subcarrier are 7.5kHz (each PRB Including 24 subcarriers), it is 5 to design each subframe internal symbol number, and corresponding CP length is 2048T_s(about 66.67us), can To design MBSFN RS as follows：

This MBSFN sub-frame structure is a kind of special frame structure.Wherein, the symbolic number in each subframe is 5, is no longer biography The even number of system.Namely the symbolic number in two time slots in subframe is unequal.For example, even timeslots have 2 OFDM symbols, Odd numbered slots have 3 OFDM symbols.Or, even timeslots have 3 OFDM symbols, and odd numbered slots have 2 OFDM Symbol.Or, there is no the concept of time slot in subframe.Or, first symbol in each subframe is reserved as unicast unicast Symbol.

Method one：Every 4 subcarriers insert each subframe (5 OFDM symbols) in a MBSFN RS, time domain on frequency domain In have 2 or 3 OFDM symbols send MBSFN RS.

In the related art, every 4 subcarriers are every 2 OFDM symbols in one MBSFN RS of insertion, time domain on frequency domain Insertion 1 arranges MBSFN RS.Each PRB pair (2 PRB) inserts 18 RS altogether.

In the method, MBSFN RS sequences generating mode is constant, pseudo random sequence generator initialization mode is constant. MBSFN RS frequency domain density or frequency domain pattern is constant, but modification MBSFN RS time domain density or time domain pattern. MBSFN RS time domain density or time domain pattern modification has two ways：The first：Reduce and MBSFN RS are sent in each subframe Number of symbols, such as only 2 symbols send MBSFN RS in each subframe, while which is redesigned in each subframe MBSFN RS are sent on a little symbols；Second：The number of symbols that MBSFN RS are sent in each subframe is constant, each subframe Upper transmission MBSFN RS number of symbols is still 3, but also needs redesign send MBSFN on which symbol in each subframe RS；

In the method, it is necessary to which time-frequency domain density or pattern to MBSFN RS are modified.Wherein, MBSFN RS frequency Domain density still keeps every 4 subcarriers to insert a MBSFN RS.Time domain density is arranged per 1-2 OFDM symbol insertion 1 MBSFN RS, it is preferred that each subframe transmission MBSFN RS symbolic number remains as 3 in time domain.

(symbol 0, symbol 1, symbol 3),

Or (symbol 0, symbol 2, symbol 4),

Or (symbol 0, symbol 2, symbol 3),

Or (symbol 1, symbol 2, symbol 4),

Or (symbol 1, symbol 3, symbol 4),

It is preferred that, selection (symbol 0, symbol 2, symbol 4) or (symbol 1, symbol 2, symbol 4) or (symbol 1, Symbol 3, symbol 4) on send MBSFN RS, first time domain pattern reason be RS same subframe intersymbol equidistantly, Be conducive to time domain interpolation channel estimation.Latter two time domain pattern is because MBSFN the 1st symbol can be reserved for unicast hair Send, for example the subframe structure for Index 5A.

The pattern that MBSFN RS are sent on distinct symbols can be with identical or frequency displacement preset number RE.It is preferred that, preset number etc. In the half of MBSFN RS frequency domain density.It is preferred that, send MBSFN RS figures on MBSFN RS odd number symbol Sample is identical, and MBSFN RS patterns are identical on even number symbol, MBSFN RS patterns on odd number and even number symbol Frequency displacement preset number RE.By taking this method as an example, MBSFN RS frequency domains density is equal to 4 RE.Above-mentioned transmission MBSFN RS Three symbols in first, the two and second transmission MBSFN pattern identical with the 3rd transmission MBSFN pattern 2 RE of frequency displacement.

By taking the transmission MBSFN RS on (symbol 0, symbol 2, symbol 4) as an example.It is assumed herein that even timeslots have 2 OFDM Symbol, odd numbered slots have 3 OFDM symbols.Therefore, it is (symbol that MBSFN RS, which send the numbering in time slot corresponding to symbol, Number 0, symbol 0, symbol 2)),

Wherein

Fig. 4 is the signal of subcarrier spacing Δ f=7.5kHz according to the preferred embodiment of the invention MBSFN RS resource impacts Figure, as shown in figure 4, each subframe includes 5 OFDM symbols.R_pRepresent is used for reference signal on antenna port p The resource element of RS transmission.

No longer it is that every 4 subcarriers insert MBSFN RS, MBSFN RS time domain pattern and are also required to according to new on frequency domain Subframe structure modify.

The initialization mode of pseudo random sequence generator is constant, but MBSFN RS sequences generating mode is needed according to frequency domain pattern Accordingly changed, for example, sent on the corresponding frequency domain of MBSFN RS OFDM symbols, each PRB is not inserted into 6 RS is (in 3GPP 36.211), but insertion 8 is (in 3GPP 36.211) Or other numbers RS.MBSFN RS time domain density or time domain pattern modification has two ways：The first：Reduce per height Only 2 symbols in MBSFN RS number of symbols, such as each subframe are sent on frame and send MBSFN RS, while again Design sends MBSFN RS in each subframe on which symbol；Second：MBSFN RS symbol is sent in each subframe The number of symbols that MBSFN RS are sent in invariable number, each subframe is still 3, but which is also needed to redesign in each subframe MBSFN RS are sent on a little symbols；

Embodiment three

MBSFN sub-frame structure corresponding for Index 6 and/or Index 6A, namely subcarrier are 7.5kHz (each PRB Including 24 subcarriers), it is 4 to design each subframe internal symbol number, and corresponding CP length is 3584T_s(about 116.67us), MBSFN RS can be designed as follows：

Method one：Every 4 subcarriers insert each subframe (4 OFDM symbols) in a MBSFN RS, time domain on frequency domain In have 2 or 3 OFDM symbols send MBSFN RS.

In the method, it is necessary to which time-frequency domain density or pattern to MBSFN RS are modified.Wherein, MBSFN RS frequency Domain density still keeps every 4 subcarriers to insert a MBSFN RS.Time domain density is arranged per 1-2 OFDM symbol insertion 1 MBSFN RS。

Each subframe transmission MBSFN RS symbolic number remains as 3 in time domain.Following symbol that specifically can be in each subframe Upper transmission MBSFN RS (numbering of the symbol serial number symbol in subframe)：

(symbol 0, symbol 1, symbol 2),

Or (symbol 0, symbol 1, symbol 3),

Or (symbol 0, symbol 2, symbol 3),

Or (symbol 1, symbol 2, symbol 3)

Or, reduce only 2 symbol hairs in the symbolic number that each subframe in time domain sends MBSFN RS, such as each subframe Send MBSFN RS.MBSFN RS are sent on following symbol that specifically can be in each subframe (in symbol serial number subframe Numbering)：

(symbol 0, symbol 2),

Or (symbol 1, symbol 3)

Because the merging of MBSFN multipaths area considerably increases the complexity of multipath, the frequency selectivity of MBSFN signals is far longer than Unicast signal, thus need bigger RS time-frequency domain density.As above design considers the accurate of MBSFN RS channel estimation Property, the possibility sending method of some influence channel estimations is eliminated, while have also contemplated that the expense for sending MBSFN RS.

The pattern that MBSFN RS are sent on distinct symbols can be with identical or frequency displacement preset number RE.It is preferred that, preset number etc. In the half of MBSFN RS frequency domain density.It is preferred that, send MBSFN RS figures on MBSFN RS odd number symbol Sample is identical, and MBSFN RS patterns are identical on even number symbol, MBSFN RS patterns on odd number and even number symbol Frequency displacement preset number RE.By taking this method as an example, MBSFN RS frequency domains density is equal to 4 RE.Above-mentioned transmission MBSFN RS Three symbols in first, the two and second transmission MBSFN pattern identical with the 3rd transmission MBSFN pattern 2 RE of frequency displacement.Or, in above-mentioned transmission MBSFN RS two symbols first with second transmission MBSFN pattern 2 RE of frequency displacement.

By taking the transmission MBSFN RS on (symbol 1, symbol 3) as an example, MBSFN RS are sent corresponding to symbol in time slot Numbering is (symbol 1, symbol 1),

Wherein

L=1 if Δs f=7.5kHz

Fig. 5 is the signal of subcarrier spacing Δ f=7.5kHz according to the preferred embodiment of the invention MBSFN RS resource impacts Figure two, as shown in figure 5, each subframe includes 4 OFDM symbols.R_pRepresent is used for reference signal on antenna port p The resource element of RS transmission.

The initialization mode of pseudo random sequence generator is constant, but MBSFN RS sequences generating mode is needed according to frequency domain pattern Accordingly changed, for example, sent on the corresponding frequency domain of MBSFN RS OFDM symbols, each PRB is not inserted into 6 RS is (in 3GPP 36.211), but insertion 8 is (in 3GPP 36.211) Or other numbers RS.MBSFN RS time domain density or time domain pattern modification has two ways：The first：Reduce per height Only 2 symbols in MBSFN RS number of symbols, such as each subframe are sent on frame and send MBSFN RS, while again Design sends MBSFN RS in each subframe on which symbol；Second：MBSFN RS symbol is sent in each subframe Invariable number, redesigns and sends MBSFN RS on which symbol in each subframe；

Example IV

MBSFN sub-frame structure corresponding for Index 7 and/or Index7A, namely subcarrier are 5.0kHz (each PRB Including 36 subcarriers), it is 4 to design each subframe internal symbol number, and corresponding CP length is 1536T_s(about 50.00us), MBSFN RS can be designed as follows：

In the related art, also how to design the generation of MBSFN RS sequences for 5kHz subcarrier spacing without scheme and provide Source mapping pattern.Therefore, the sequence generation to 5kHz subcarrier spacing MBSFN RS or time-frequency domain are needed in the method Density or pattern are designed.

Method one：Every 6 subcarriers insert a MBSFN RS on frequency domain.Each subframe (4 OFDM in time domain Symbol) in there are 3 symbols to send MBSFN RS.

Time domain density is to arrange MBSFN RS per 1-2 OFDM symbol insertion 1.Each subframe sends MBSFN RS in time domain OFDM symbol number be 3.

This method advantage is that existing MBSFN RS sequences generating mode can be with the initialization side of constant pseudo random sequence generator Formula is constant, the RS invariable numbers of each PRB insertions on frequency domain.In time domain still with existing subcarrier spacing 15kHz/7.5kHz is identical, has in each subframe and sends RS on 3 symbols.Therefore smaller, realization is changed based on currently existing scheme Complexity is small.

(symbol 0, symbol 1, symbol 2),

Or (symbol 0, symbol 1, symbol 3),

Or (symbol 0, symbol 2, symbol 3),

Or (symbol 1, symbol 2, symbol 3)

By taking the transmission MBSFN RS on (symbol 0, symbol 2, symbol 3) as an example, Fig. 6 is according to the preferred embodiment of the present invention Subcarrier spacing Δ f=5kHz MBSFN RS resource impacts schematic diagram one, as shown in Figure 6.

Method two：Every 6 subcarriers insert a MBSFN RS on frequency domain.Each subframe (4 OFDM in time domain Symbol) in have 1 or 2 symbols send MBSFN RS.

Time domain density is to arrange MBSFN RS per 1-2 OFDM symbol insertion 1.Each subframe sends MBSFN RS in time domain Symbolic number be 1 or 2.

This method advantage is that existing MBSFN RS sequences generating mode can be with the initialization side of constant pseudo random sequence generator Formula is constant, the RS invariable numbers of each PRB insertions on frequency domain, therefore changes smaller based on currently existing scheme, realizes complicated Property is small.Secondly, if there is 3 symbols to send MBSFN on each 4 symbols of subframe in time domain, time domain expense is larger.Side Method two reduces the time domain expense for sending MBSFN RS.

(symbol 0, symbol 2),

Or (symbol 1, symbol 3)

By taking the transmission MBSFN RS on (symbol 1, symbol 3) as an example, Fig. 7 is subcarrier according to the preferred embodiment of the invention The schematic diagram two of interval delta f=5kHz MBSFN RS resource impacts, as shown in Figure 7.

Method three：Sending on the corresponding frequency domain of MBSFN RS OFDM symbols, more RS are may be inserted into each PRB (being more than 6 RS).The symbolic number that each subframe (4 OFDM symbols) sends MBSFN RS in time domain is 1 or 2 Or 3.

The initialization mode of pseudo random sequence generator is constant, but MBSFN RS sequence generating modes are modified, in frequency domain Not being inserted into the RS numbers inserted in 6 RS, each PRB in upper each PRB can be with more.Each subframe hair in time domain The symbolic number for sending MBSFN RS is 1 or 2 or 3.

This method advantage be MBSFN RS time-frequency domain resources mapping it is more uniform, while reduce MBSFN RS transmission when Domain expense, while also ensure that MBSFN RS channel estimating performance.

For example sending on the corresponding frequency domain of MBSFN RS OFDM symbols, each PRB is not inserted into 6 RS (3GPP In 36.211), but (m is 9 RS of insertion in modification 3GPP 36.211).Etc..It is 5.0kHz for example for subcarrier, every 9 subcarriers insert one on frequency domain MBSFN RS.The symbolic number that each subframe sends MBSFN RS in time domain is 2 or 3.

(symbol 0, symbol 1, symbol 2),

Or (symbol 0, symbol 1, symbol 3),

Or (symbol 0, symbol 2, symbol 3),

Or (symbol 1, symbol 2, symbol 3)

Or (symbol 0, symbol 2),

Or (symbol 1, symbol 3)

(such as in (symbol 1, symbol so that each PRB is inserted and is had 2 symbols to send RS in 9 RS, each subframes as an example 3) on) on send MBSFN RS exemplified by, Fig. 8 is subcarrier spacing Δ f=5kHz according to the preferred embodiment of the invention The schematic diagram three of MBSFN RS resource impacts, as shown in Figure 8.

Through the above description of the embodiments, those skilled in the art can be understood that the side according to above-described embodiment Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases before Person is more preferably embodiment.Understood based on such, technical scheme substantially makes tribute to prior art in other words The part offered can be embodied in the form of software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disc, CD) in, including some instructions to cause a station terminal equipment (can be mobile phone, computer, Server, or the network equipment etc.) perform method described in each embodiment of the invention.

It should be noted that above-mentioned modules can be by software or hardware to realize, for the latter, can by with Under type is realized, but not limited to this：Above-mentioned module is respectively positioned in same processor；Or, above-mentioned module is located at multiple places respectively Manage in device.

Embodiments of the invention additionally provide a kind of storage medium.Alternatively, in the present embodiment, above-mentioned storage medium can be by It is set to the program code that storage is used to perform the method and step of above-described embodiment.

Alternatively, storage medium is also configured to the program code that storage is used to perform the method and step of above-described embodiment.

Alternatively, in the present embodiment, above-mentioned storage medium can include but is not limited to：USB flash disk, read-only storage (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disc or Person's CD etc. is various can be with the medium of store program codes.

Alternatively, in the present embodiment, processor performs the side of above-described embodiment according to the program code stored in storage medium Method step.

Alternatively, the specific example in the present embodiment may be referred to the example described in above-described embodiment and optional embodiment, The present embodiment will not be repeated here.

Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can use general calculating Device realizes that they can be concentrated on single computing device, or be distributed on the network that multiple computing devices are constituted, Alternatively, they can be realized with the executable program code of computing device, it is thus possible to be stored in storage device In performed by computing device, and in some cases, can be to perform shown or described step different from order herein Suddenly, they are either fabricated to each integrated circuit modules respectively or be fabricated to the multiple modules or step in them single Integrated circuit modules are realized.So, the present invention is not restricted to any specific hardware and software combination.

The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art For, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made, etc. With replacement, improvement etc., it should be included in the scope of the protection.

Claims

1. a kind of subframe processing method, it is characterised in that including：

Subframe is sent, wherein, the length of the cyclic prefix CP of the subframe is more than or equal to 1024T_s, T_s=1/ (15000 × 2048)_S。

2. according to the method described in claim 1, it is characterised in that

The length of the CP is one below：1536·T_s, 1792T_s, 2048T_s, 3584T_s, 4096T_s, 7168·T_s。

3. according to the method described in claim 1, it is characterised in that also include：

The subframe is without unicast unicast control sections and/or without cell reference signals CRS.

4. according to the method described in claim 1, it is characterised in that the structure of the subframe is configured at least one of：

Subcarrier spacing is 15kHz, and the symbolic number of each subframe is 10, unicast unicast parts OFDM symbol number For 0, the CP length is 1024T_s, each PRB sub-carrier number is 12；

Subcarrier spacing is 15kHz, and the symbolic number of each subframe is 8, and unicast unicast parts OFDM symbol number is 0, the CP length is 1792T_s, each PRB sub-carrier number is 12；

Subcarrier spacing is 7.5kHz, and the symbolic number of each subframe is 4, and unicast unicast parts OFDM symbol number is 0, the CP length is 3584T_s, each PRB sub-carrier number is 24；

Subcarrier spacing is 5.0kHz, and the symbolic number of each subframe is 4, and unicast unicast parts OFDM symbol number is 0, the CP length is 1536T_s, each PRB sub-carrier number is 36；

Subcarrier spacing is 3.5kHz, and the symbolic number of each subframe is 2, and unicast unicast parts OFDM symbol number is 0, the CP length is 7168T_s, each PRB sub-carrier number is 48；

Subcarrier spacing is 15kHz, and the symbolic number of each subframe is 10, first 1 or preceding 2 OFDM of the subframe Symbol is unicast unicast parts, and the CP length is 1024T_s, each PRB sub-carrier number is 12；

Subcarrier spacing is 15kHz, and the symbolic number of each subframe is 8, first 1 or preceding 2 OFDM of the subframe Symbol is unicast unicast parts, and the CP length is 1024T_s, each PRB sub-carrier number is 12.

5. according to the method described in claim 1, it is characterised in that in the subframe be multicast single frequency network MBSFN sub-frame In the case of, during sending the multicast single frequency network MBSFN sub-frame, methods described also includes：

The MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the MBSFN RS Time domain density or time domain pattern, or, change the MBSFN reference signals RS of subframe frequency domain density or frequency domain Pattern, and change the time domain density or time domain pattern of the MBSFN RS,

Wherein, the time domain density of the modification MBSFN RS or the mode of time domain pattern include at least one of： The number of symbols that MBSFN RS are sent in each subframe is less than hair on 3, the predetermined symbol in each subframe Send the MBSFN RS；The number of symbols that MBSFN RS are sent in each subframe is equal to 3, in each son The MBSFN RS, the MBSFN reference signals RS of modification subframe frequency are sent on predetermined symbol on frame Domain density or frequency domain pattern include：Sending on the corresponding frequency domain of the single OFDM symbols of MBSFN RS, each PRB Insertion is more than 6 RS.

6. method according to claim 5, it is characterised in that

Sent on distinct symbols the MBSFN RS pattern is identical or frequency displacement preset number RE.

7. method according to claim 5, it is characterised in that

It is 15kHz in subcarrier spacing, the symbolic number of each subframe is 8, and the CP length is 1792T_sSituation Under, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the MBSFN RS Time domain density or time domain pattern include：The frequency domain density of the MBSFN RS is that every 2 subcarriers insert 1 The MBSFN RS, the time domain density is to have 2 or 3 OFDM symbols to send MBSFN RS in each subframe.

8. method according to claim 5, it is characterised in that

It is 7.5kHz in subcarrier spacing, the symbolic number of each subframe is 5, and the CP length is 2048T_sSituation Under, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the MBSFN RS Time domain density or time domain pattern include：The frequency domain density of the MBSFN RS is that every 4 subcarriers insert one The MBSFN RS, the time domain density is to have 2 in each subframe or 3 OFDM symbols send MBSFN RS, or, the MBSFN reference signals RS of the modification subframe frequency domain density or frequency domain pattern include：In hair Send on the corresponding frequency domain of the single OFDM symbols of MBSFN RS, each PRB inserts 8 or 12 RS.

9. method according to claim 5, it is characterised in that

It is 7.5kHz in subcarrier spacing, the symbolic number of each subframe is 4, and the CP length is 3584T_sSituation Under, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the MBSFN RS Time domain density or time domain pattern include：The frequency domain density of the MBSFN RS is that every 4 subcarriers insert 1 The MBSFN RS, the time domain density is to have 2 in each subframe or 3 OFDM symbols send MBSFN RS, or, the MBSFN reference signals RS of the modification subframe frequency domain density or frequency domain pattern include：In hair Send on the corresponding frequency domain of the single OFDM symbols of MBSFN RS, each PRB inserts 8 or 12 RS.

10. method according to claim 5, it is characterised in that

It is 5kHz in subcarrier spacing, the symbolic number of each subframe is 4, and the CP length is 1536T_sIn the case of, The MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is changed, and changes the MBSFN RS Time domain density or time domain pattern include one below：

Every 6 subcarriers of the frequency domain density of the MBSFN RS insert 1 MBSFN RS, the time domain Density is to have 1 or 2 in each subframe or 3 OFDM symbols send MBSFN RS；

Sending on the corresponding frequency domain of the single OFDM symbols of MBSFN RS, the frequency domain density is each PRB The number of subcarriers for inserting RS is more than 6, and the time domain density is that the symbolic number that each subframe sends MBSFN RS is 1 or 2 or 3.

11. a kind of subframe processing unit, it is characterised in that including：

Sending module, for sending subframe, wherein, the length of the cyclic prefix CP of the subframe is more than or equal to 1024T_s, T_s=1/ (15000 × 2048)_S。

12. device according to claim 11, it is characterised in that

13. device according to claim 11, it is characterised in that also include：

14. device according to claim 11, it is characterised in that the structure of the subframe is configured at least one of：

15. device according to claim 11, it is characterised in that sub for multicast single frequency network MBSFN in the subframe In the case of frame, during sending the multicast single frequency network MBSFN sub-frame, described device also includes：

16. device according to claim 15, it is characterised in that

17. device according to claim 15, it is characterised in that

18. device according to claim 17, it is characterised in that

It is 7.5kHz in subcarrier spacing, the symbolic number of each subframe is 5, and the CP length is 2048T_sSituation Under, the MBSFN reference signals RS of subframe frequency domain density or frequency domain pattern is constant, changes the MBSFN RS Time domain density or time domain pattern include：The frequency domain density of the MBSFN RS is that every 4 subcarriers insert one The MBSFN RS, the time domain density is to have 2 in each subframe or 3 OFDM symbols send MBSFN RS, or, the MBSFN reference signals RS of the modification subframe frequency domain density or frequency domain pattern are included in transmission On the corresponding frequency domain of the single OFDM symbols of MBSFN RS, each PRB inserts 8 or 12 RS.

19. device according to claim 17, it is characterised in that

20. device according to claim 17, it is characterised in that