CN104685848A

CN104685848A - Information sending method and cp type determination method

Info

Publication number: CN104685848A
Application number: CN201380001551.3A
Authority: CN
Inventors: 李强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-09-29
Filing date: 2013-09-29
Publication date: 2015-06-03
Also published as: WO2015042916A1

Abstract

Disclosed is an information sending method, wherein the method comprises: a first communication node determining cyclic prefix (CP) type information, wherein the CP type information indicates a type of a CP in a corresponding first subframe; and the first communication node sending the CP type information to a second communication node through the first subframe so as to enable the second communication node to determine the type of the CP in the first subframe based on the CP type information. Also disclosed are a CP type determination method, the first communication node and the second communication node.

Description

INFORMATION SENDING METHOD AND CP TYPE DETERMINATION METHOD

A kind of method for sending information and the method and technology field for determining CP types

The application is related to wireless communication technology field, the more particularly to a kind of method for sending information and the method for determining CP types.Background technology

LTE (Long Term Evolution, Long Term Evolution）The downlink transfer of system can be cut into subframe one by one in time（), subframe the length of each subframe is 1ms (milliseconds）.Each subframe further be cut into two slot (time slots）, each slot length is 0.5ms.Each slot is cut into 6 or 7 OFDM (Orthogonal Frequency Division Multi- Access, OFDM) symbol again.

Modulation system of the downlink transfer of LTE system based on OFDM, the data of the downlink transfer of LTE system can be converted to ofdm signal first, then be transmitted.In OFDM transmission, the data for needing to transmit can be mapped on each subcarrier first, then pass through IFFT (Inverse Fast Fourier Transform, Fast Fourier Transform Inverse）, signal is converted into time domain from frequency domain.The last part of time-domain signal is copied into time-domain signal foremost again.The signal that this part is replicated is referred to as CP (Cyclic Prefix, cyclic prefix）.CP main function is to resist interference problem between the OFDM symbol that the multi-path channel transmission in wireless communication system is brought.

The different CP types of two kinds of length are defined in LTE protocol, are respectively：Common CP (normal CP) and expansion CP (extended CP).If using expanding CP, slot will cutting be 6 OFDM symbols；If using common CP, a slot will be cut into 7 OFDM symbols.

In existing LTE system, a usual cell can only use one of which CP types, and (Multimedia Broadcast multicast service broadcast the good business of the moon except MBMS）Foretell all subframes at subframe sunset and OFDM symbol is all generated using such CP.For example：The selection of certain cell uses common CP, then what all subframes of this cell were used is all common CP.UE (User Equipment, user equipment in the cell）The high-level signaling or SCH that can be issued by network side equipment (Synchronization Channel, synchronizing channel）In synchronizing signal, know the type for the CP that current area is used.

But, the downlink transfer of LTE system of the prior art can at least have following technical problem：In the downlink transfer of LTE system in the prior art, have the common CP situation mixed with CP is expanded, and which subframe the unpredictable common CPs of UE and expansion CP use in respectively, now, it is accomplished by the type that network side equipment notifies the CP in UE descending sub frames in time, but the high-level signaling issued due to network side equipment and the renewal of synchronizing signal are slow, so, there is network side equipment can not notify which subframe of UE to be the common CP carried in time, and which subframe is the expansion CP carried technical problem.So as to cause UE can not determine the type for the CP that each descending sub frame is carried in time, and then UE is set to be demodulated, receive to the data in descending sub frame based on correct CP types without hair.For example：Network side equipment actual transmissions are to expand CP, and UE demodulation is demodulated according to common CP, is just unable to properly receive data.For another example：Network side equipment actual transmissions are common CPs, and UE demodulation is demodulated according to CP is expanded, and is just unable to properly receive data.

To sum up, in LTE system of the prior art, in the case where there is common CP mixed with CP is expanded, exist network side equipment can not CP types of notifying user equipment UE downlink transfer subframes in time technical problem.The content of the invention

A kind of method of the embodiment of the present application by providing method for sending information and determining CP types, solve in LTE system of the prior art, in the case where there is common CP mixed with CP is expanded, exist network side equipment can not CP types of notifying user equipment UE downlink transfer subframes in time technical problem.

In a first aspect, the embodiment of the present application provides a kind of method for sending information, methods described includes：First communication node determines cyclic prefix CP type information, wherein, the CP type informations represent the type of the CP in corresponding first subframe；

First communication node sends the CP type informations by first subframe to the second communication node, so that second communication node can determine the type of the CP in first subframe according to the CP type informations. With reference in a first aspect, in the first possible embodiment, first communication node sends the CP type informations by first subframe to the second communication node, including：

The CP type informations are placed in first OFDM OFDM symbol of the particular time-slot in first subframe and/or last OFDM symbol by first communication node；

First communication node sends the CP type informations by first OFDM symbol and/or last OFDM symbol.

The first possible embodiment with reference to first aspect or first aspect, in second of possible embodiment, before first communication node sends the CP type informations by first subframe to the second communication node, methods described also includes：

First communication node type identical CP that addition is represented with the CP type informations in the OFDM symbol for carrying the CP type informations.

Second of possible embodiment with reference to the first possible embodiment or first aspect of first aspect or first aspect, in the third possible embodiment, the particular time-slot is first time slot in first subframe.

The third possible embodiment with reference to second possible embodiment or first aspect of the first possible embodiment or first aspect of first aspect or first aspect, in the 4th kind of possible embodiment, first subframe includes the subframe that ^ ^ carry the CP type informations.

The 4th kind of possible embodiment with reference to the third possible embodiment or first aspect of second possible embodiment or first aspect of the first possible embodiment or first aspect of first aspect or first aspect, in the 5th kind of possible embodiment, first subframe also includes carrying N number of subframe after the subframe of the CP type informations, wherein, N is positive integer.

With reference to first aspect or the above-mentioned various possible embodiments of first aspect, in the 6th kind of possible embodiment, first communication node sends the CP type informations by first subframe to the second communication node, including：

First communication node sends the CP type informations by continuous M subcarrier in first subframe or discontinuous M subcarrier to second communication node, wherein, M is positive integer.

With reference to first aspect or the above-mentioned various possible embodiments of first aspect, in the 7th kind of possibility Embodiment in, first communication node sends the CP type informations by first subframe to the second communication node, including：

The CP type informations and demodulated reference signal are sent jointly to second communication node by first communication node by first subframe.

With reference to first aspect or the above-mentioned various possible embodiments of first aspect, in the 8th kind of possible embodiment, methods described also includes：

First communication node is using other resource transmissions other channel informations outside the resource for transmitting the CP type informations.

With reference to first aspect or the above-mentioned various possible embodiments of first aspect, in the 9th kind of possible embodiment, methods described also includes：

First communication node is by the type of the CP in the second subframe for not corresponding to CP type informations in preset duration, second communication node is notified by high-level signaling or synchronizing signal, so that second communication node determines the type of the CP in second subframe.

Second aspect, the embodiment of the present application provides a kind of method of determination CP types, and methods described includes：Second communication node receives the CP type informations from the first communication node；Wherein, the CP type informations are sent by first communication node by the first subframe, and corresponding with first subframe；Second communication node determines the type of the CP in first subframe according to the CP type informations.

With reference to second aspect, in the first possible embodiment, second communication node receives the CP type informations from the first communication node, including：

Second communication node receives the CP type informations by first OFDM symbol of particular time-slot in first subframe and/or last OFDM symbol.

With reference to the first possible embodiment of second aspect or second aspect, in second of possible embodiment, second communication node receives the CP type informations by first OFDM symbol of particular time-slot in first subframe and/or last OFDM symbol, including：

If the CP type informations are placed in first OFDM symbol of particular time-slot in first subframe, second communication node uses normal CP, demodulates first OFDM symbol, obtains institute State CP type informations；

If the CP type informations are placed in first subframe in last OFDM symbol of particular time-slot, second communication node obtains the CP type informations using normal CP or extension CP, last described OFDM symbol of demodulation.

With reference to second of possible embodiment of the first possible embodiment or second aspect of second aspect or second aspect, in the third possible embodiment, first subframe includes the subframe for carrying the CP type informations.

With reference to the third possible embodiment of second possible embodiment or second aspect of the first possible embodiment or second aspect of second aspect or second aspect, in the 4th kind of possible embodiment, first subframe also includes carrying N subframe after the subframe of the CP type informations, wherein, N is positive integer.

With reference to second aspect or the above-mentioned various possible embodiments of second aspect, in the 5th kind of embodiment, methods described also includes：

Second communication node receives the CP for the second subframe for not corresponding to CP type informations in the preset duration that first communication node is sent by high-level signaling or synchronizing signal type, so that second communication node determines the CP of second subframe type.

The third aspect, the embodiment of the present application provides a kind of first communication node, including：

First determining unit, for determining cyclic prefix CP type information, wherein, the CP type informations represent the type of the CP in corresponding first subframe；

Transmitting element, for receiving the CP type informations from first determining unit, and the CP type informations are sent to the second communication node by first subframe, so that second communication node can determine the type of the CP in first subframe according to the CP type informations.

With reference to the third aspect, in the first possible embodiment, the transmitting element includes：Module is placed in, for the CP type informations to be placed in first OFDM OFDM symbol of the particular time-slot in first subframe and/or last OFDM symbol；

First sending module, for sending the CP type informations by first OFDM symbol and/or last OFDM symbol. With reference to the first possible embodiment of the third aspect or the third aspect, in second of possible embodiment, first communication node also includes：

Adding device, for before the CP type informations are sent to the second communication node by first subframe, the type identical CP represented with the CP type informations to be added in the OFDM symbol for carrying the CP type informations.

With reference to second of possible embodiment of the first possible embodiment or the third aspect of the third aspect or the third aspect, in the third possible embodiment, the particular time-slot is first time slot in first subframe.

With reference to the third possible embodiment of second possible embodiment or the third aspect of the first possible embodiment or the third aspect of the third aspect or the third aspect, in the 4th kind of possible embodiment, first subframe includes the subframe that ^ ^ carry the CP type informations.

With reference to the 4th kind of possible embodiment of the third possible embodiment or the third aspect of second possible embodiment or the third aspect of the first possible embodiment or the third aspect of the third aspect or the third aspect, in the 5th kind of possible embodiment, first subframe also includes carrying N number of subframe after the subframe of the CP type informations, wherein, N is positive integer.

With reference to the third aspect or the above-mentioned various possible embodiments of the third aspect, in the 6th kind of possible embodiment, the transmitting element also includes：

Second sending module, for sending the CP type informations to second communication node by continuous M subcarrier in first subframe or discontinuous M subcarrier, wherein, M is positive integer.

With reference to the third aspect or the above-mentioned various possible embodiments of the third aspect, in the 7th kind of possible embodiment, the transmitting element also includes：

3rd sending module, for the CP type informations and demodulated reference signal to be sent jointly into second communication node by first subframe.

With reference to the third aspect or the above-mentioned various possible embodiments of the third aspect, in the 8th kind of possible embodiment, first communication node also includes：

Transmission unit, for using other resource transmissions other channel informations outside the resource for transmitting the CP type informations. With reference to the third aspect or the above-mentioned various possible embodiments of the third aspect, in the 9th kind of possible embodiment, first communication node also includes：

Notification unit, for by the type of the CP in the second subframe for not corresponding to CP type informations in preset duration, second communication node is notified by high-level signaling or synchronizing signal, so that second communication node determines the type of the CP in second subframe.

Fourth aspect, the embodiment of the present application provides a kind of second communication node, including：

First receiving unit, for receiving the CP type informations from the first communication node；Wherein, the CP type informations are sent by first communication node by the first subframe, and corresponding with first subframe；Second determining unit, for obtaining the CP type informations from the receiving unit, and according to the CP type informations, determines the type of the CP in first subframe.

With reference to fourth aspect, in the first possible embodiment, first receiving unit includes：First receiving module, the CP type informations are received for first OFDM symbol by particular time-slot in first subframe and/or last OFDM symbol.

With reference to the first possible embodiment of fourth aspect or fourth aspect, in second of possible embodiment, first receiving module is additionally operable to：

If the CP type informations are placed in first OFDM symbol of particular time-slot in first subframe, using normal CP, first OFDM symbol is demodulated, the CP type informations are obtained；If the CP type informations are placed in first subframe in last OFDM symbol of particular time-slot, using normal CP or extension CP, last described OFDM symbol of demodulation obtains the CP type informations.

With reference to second of possible embodiment of the first possible embodiment or fourth aspect of fourth aspect or fourth aspect, in the third possible embodiment, first subframe includes the subframe for carrying the CP type informations.

With reference to the third possible embodiment of second possible embodiment or fourth aspect of the first possible embodiment or fourth aspect of fourth aspect or fourth aspect, in the 4th kind of possible embodiment, first subframe also includes carrying N subframe after the subframe of the CP type informations, wherein, N is positive integer. With reference to fourth aspect or above-mentioned each a variety of possible embodiments of fourth aspect, in the 5th kind of possible embodiment, second communication node also includes：

Second receiving unit, for the type for the CP for receiving the second subframe for not corresponding to CP type informations in the preset duration that first communication node is sent by high-level signaling or synchronizing signal, so that second communication node determines the CP of second subframe type.

5th aspect, the embodiment of the present application provides a kind of first communication node, including：

First processor, for determining cyclic prefix CP type information, wherein, the CP type informations represent the type of the CP in corresponding first subframe；The CP type informations are sent to the second communication node by first subframe, so that second communication node can determine the type of the CP in first subframe according to the CP type informations.

With reference to the 5th aspect, in the first possible embodiment, the first processor is additionally operable to：The CP type informations are placed in first OFDM OFDM symbol of the particular time-slot in first subframe and/or last OFDM symbol；The CP type informations are sent by first OFDM symbol and/or last OFDM symbol.

With reference to the first possible embodiment of the 5th face side or the 5th face side, in second of possible embodiment, the first processor is additionally operable to：

It is described the CP type informations are sent to the second communication node by first subframe before, the type identical CP that addition is represented with the CP type informations in the OFDM symbol for carrying the CP type informations.

With reference to the first possible embodiment or second of possible embodiment of the 5th face side of the 5th face side or the 5th face side, in the third possible embodiment, the particular time-slot is first time slot in first subframe.

With reference to second of possible embodiment or the third possible embodiment of the 5th face side of the first possible embodiment or the 5th face side of the 5th face side or the 5th face side, in the 4th kind of possible embodiment, first subframe includes the subframe that ^ ^ carry the CP type informations.

With reference to the first possible embodiment or second of possible embodiment of the 5th face side or the third possible embodiment of the 5th face side or the 5th face side of the 5th face side or the 5th face side 4th kind of possible embodiment, in the 5th kind of possible embodiment, first subframe also includes carrying N number of subframe after the subframe of the CP type informations, wherein, N is positive integer.

With reference to the above-mentioned various possible embodiments of the 5th face side or the 5th face side, in the 6th kind of possible embodiment, the first processor is additionally operable to：

The CP type informations are sent to second communication node by continuous M subcarrier in first subframe or discontinuous M subcarrier, wherein, M is positive integer.

With reference to the above-mentioned various possible embodiments of the 5th face side or the 5th face side, in the 7th kind of possible embodiment, the first processor is additionally operable to：

The CP type informations and demodulated reference signal are sent jointly to by second communication node by first subframe.

With reference to the above-mentioned various possible embodiments of the 5th face side or the 5th face side, in the 8th kind of possible embodiment, the first processor is additionally operable to：

Using other resource transmissions other channel informations outside the resource for transmitting the CP type informations.With reference to the above-mentioned various possible embodiments of the 5th face side or the 5th face side, in the 9th kind of possible embodiment, the first processor is additionally operable to：

By the type of the CP in the second subframe for not corresponding to CP type informations in preset duration, second communication node is notified by high-level signaling or synchronizing signal, so that second communication node determines the type of the CP in second subframe.

6th aspect, the embodiment of the present application provides a kind of second communication node, including：

Second processor, for receiving the CP type informations from the first communication node；Wherein, it is described

CP type informations are sent by first communication node by the first subframe, and corresponding with first subframe；According to the CP type informations, the type of the CP in first subframe is determined.

With reference to the 6th aspect, in the first possible embodiment, the second processor is additionally operable to：By first OFDM symbol of particular time-slot in first subframe and/or last

OFDM symbol receives the CP type informations.

With reference to the 6th aspect or the first possible embodiment of the 6th aspect, in second of possible embodiment, the second processor is additionally operable to： If the CP type informations are placed in first OFDM symbol of particular time-slot in first subframe, using normal CP, first OFDM symbol is demodulated, the CP type informations are obtained；If the CP type informations are placed in first subframe in last OFDM symbol of particular time-slot, using normal CP or extension CP, last described OFDM symbol of demodulation obtains the CP type informations.

With reference to second of possible embodiment of the first possible embodiment or the 6th aspect of the 6th aspect or the 6th aspect, in the third possible embodiment, first subframe includes the subframe for carrying the CP type informations.

With reference to second of possible embodiment or the third possible embodiment of the 6th aspect of the first possible embodiment or the 6th aspect of the 6th aspect or the 6th aspect, in the 4th kind of possible embodiment, first subframe also includes carrying N subframe after the subframe of the CP type informations, wherein, N is positive integer.

With reference to the 6th aspect or the above-mentioned various possible embodiments of the 6th aspect, in the 5th kind of possible embodiment, the second processor is additionally operable to：

The CP for the second subframe for not corresponding to CP type informations in the preset duration that first communication node is sent by high-level signaling or synchronizing signal type is received, so that second communication node determines the CP of second subframe type.

Technical scheme has the beneficial effect that in the embodiment of the present application：

The method of the transmission information provided according to first aspect, the method for the determination CP types that second aspect is provided, the first communication node that the third aspect or the 5th aspect are provided, the second communication node that fourth aspect or the 6th aspect are provided is understood, because the first communication node to the second communication node before the first subframe is sent, first communication node determines the corresponding CP type informations of the first subframe first, wherein, the CP type informations represent the type of the CP in the first subframe, first communication node sends the CP type informations to the second communication node again, so that the second communication node can determine the type of the CP in the first subframe according to the CP type informations.Wherein, the first communication node can be network side equipment, and the second communication node can be user equipment (UE).So, efficiently solve in LTE system of the prior art in the case where there is common CP mixed with CP is expanded, there is user equipment (UE) can not know the CP types of downlink transfer subframe in time Technical problem, realize in LTE system have common CP with expand CP it is mixed in the case of, UE can determine the technique effect of the CP of descending sub frame type in time based on CP type informations.Brief description of the drawings

Fig. 1 is the flow chart of method for sending information in the embodiment of the present application one；

The refined flow chart that Fig. 2 is step S103 in the embodiment of the present application one；

The schematic diagram of first OFDM symbol of the particular time-slot that Fig. 3 A are placed in the first subframe for CP type informations in the embodiment of the present application one；

The schematic diagram of last OFDM symbol of the particular time-slot that Fig. 3 B are placed in the first subframe for CP type informations in the embodiment of the present application one；

Fig. 4 A are the schematic diagram of the continuous subcarrier of CP type informations occupancy in the embodiment of the present application one；Fig. 4 B are the schematic diagram of the discontinuous subcarrier of CP type informations occupancy in the embodiment of the present application one；Fig. 5 be the embodiment of the present application one in when CP type informations are transmitted together with demodulated reference signal, subcarrier service condition schematic diagram；

Fig. 6 is the method flow diagram of determination CP types in the embodiment of the present application two；

Fig. 7 is the structural representation of the first communication node in the embodiment of the present application three；

Fig. 8 is the structural representation of the second communication node in the embodiment of the present application four；

Fig. 9 is the structural representation of the first communication node in the embodiment of the present application five；

Figure 10 is the structural representation of the second communication node in the embodiment of the present application six.Embodiment

A kind of method of the embodiment of the present application by providing method for sending information and determining CP types, in LTE system of the prior art, in the case where there is common CP mixed with CP is expanded, exist network side equipment can not CP types of notifying user equipment UE downlink transfer subframes in time technical problem.

The technical scheme of the embodiment of the present application is in order to solve the above technical problems, general thought is as follows：

A kind of method for sending information, this method includes：

First communication node determines CP type informations, wherein, the CP type informations represent corresponding first The type of CP in subframe；

First communication node sends the CP type informations by the first subframe to the second communication node, so that the second communication node can determine the type of the CP in the first subframe according to the CP type informations.

To make the purpose, technical scheme and advantage of the embodiment of the application one clearer, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of the application protection.

Illustrate first, herein presented term " and/or ", a kind of only incidence relation for describing affiliated partner, expression may have three kinds of relations, for example, A and/or B, can be represented：Individualism A, while there is A and B, these three situations of individualism B.In addition, character herein "/,, typically represent forward-backward correlation object be it is a kind of " or " relation.

Embodiment one

The present embodiment provides a kind of method for sending information, and applied in the first communication node, the first node can be network side equipment, such as:Base station.As shown in figure 1, the method for the transmission information includes：

Step S101:First communication node determines CP type informations, wherein, the CP type informations represent the type of the CP in corresponding first subframe.

In specific implementation process, CP (Cyclic Prefix, cyclic prefix) includes：Common CP (normal CP) and expansion CP (extended CP) two types.CP type informations in the embodiment of the present application are used for the type for informing the CP in second the first subframe of communication node, so that the second communication node can determine the type of CP in the first subframe, and the data in first subframe are demodulated based on correct CP types, received.Generally, step S101 is exactly the CP types that the first communication node determines to be issued in the first subframe of the second communication node, and obtains the CP type informations of the CP types for representing the first subframe.

Step S103:First communication node sends the CP type informations by the first subframe to the second communication node, so that the second communication node can determine the type of the CP in the first subframe according to the CP type informations. In the prior art, the first communication node will not carry the CP type informations when sending descending sub frame data to the second communication node in descending sub frame.And in the embodiment of the present application, the first communication node is sent to the second communication node by the corresponding CP type informations of the first subframe, by the first subframe, so that the second communication node can determine the type of CP in the first subframe according to the CP type informations.Wherein, the first communication node refers specifically to network side equipment（Such as：Base station）, the second communication node refers specifically to user equipment

UE.So, efficiently solve in LTE system of the prior art in the case where there is common CP mixed with CP is expanded, there is user equipment (UE) can not know the technical problem of CP types of downlink transfer subframe in time.Realize in LTE system in the case where there is common CP mixed with CP is expanded, user equipment (UE) can be based on the CP type informations received, the technique effect of the timely type for confirming the CP in the first subframe corresponding with the CP type informations.

Further, before step S103, this method also includes：

Step S102:The first communication node type identical CP that addition is represented with the CP type informations in the OFDM symbol for carrying the CP type informations.

In specific implementation process, for the intersymbol interference problem that anti-multipath time delay is brought, when transmitting the CP type informations, it is also desirable to add CP before the CP type informations.Adding the CP before CP type informations can be the CP of same type, can also be different types of CP with the CP of the first subframe.Preferably, type and the CP of the first subframe type identical CP are added before CP type informations, so, the difficulty of data in the first subframe of generation can be reduced.

Further, as shown in Fig. 2 step S103 includes：

Step S201:The CP type informations are placed in first OFDM symbol of the particular time-slot in the first subframe and/or last OFDM symbol by the first communication node.

Step S202:The CP type informations are sent to the second communication node by the first communication node by first OFDM symbol and/or last OFDM symbol.

In specific implementation process, the first subframe refers to the class subframe that CP types are known by CP type informations, can be a subframe or multiple subframes.Wherein, each subframe includes two time slots in the first subframe, i.e.,：First time slot and second time slot.Above-mentioned mentioned particular time-slot can be any one time slot in this two time slot. In specific implementation process, when the CP type informations are located at first OFDM symbol of the particular time-slot in the first subframe, no matter the CP of first OFDM symbol is common CP or expands CP, second communication node can receive mode based on common CP, first OFDM symbol is received, so as to obtain the CP type informations in the first OFDM symbol.Specific reason is as follows：

As shown in Figure 3A, Fig. 3 A top halfs illustrate the structure of a time slot for employing common CP, it is seen that have 7 OFDM symbols, are respectively：OFDM symbol 11, OFDM symbol 12, OFDM symbols 13, OFDM symbol 14, OFDM symbol 15, OFDM symbol 16, OFDM symbol 17.And Fig. 3 A the latter half illustrates a structure for employing the time slot for expanding CP, it is seen that have 6 OFDM symbols, it is respectively：OFDM symbol 21, OFDM symbol 22, OFDM symbol 23, OFDM symbols 24, OFDM symbol 25, OFDM symbol 26.Then, CP type informations are placed in first OFDM symbol, are specially：If the first communication node is actual to use common CP, CP type informations are positioned in OFDM symbol 11；If the first communication node is actual to use expansion CP, CP type informations are positioned in OFDM symbol 21.

Situation 1:If the actual transmission of the first communication node is strictly to employ common CP, then go demodulation to be normal using common CP, there is no problem.As shown in Figure 3, referring specifically to Fig. 3 A top half, at time point d sections of time point b in OFDM symbol 11, be the corresponding CP type informations of the first subframe, time point b sections of time point a in OFDM symbol 11, for the CP in front of the CP type informations.It can be seen that, in the first communication node actual use common CP, the second communication node is received based on common CP to OFDM symbol 11, can obtain the complete CP type informations at time point d sections of time point b in OFDM symbol 11.And then, the second communication node can be based on the CP type informations, determine the CP types of the first subframe.

Situation 2:As shown in Figure 3A, referring specifically to Fig. 3 A the latter half, if the actual transmission of the first communication node employs expansion CP, then time point e sections of time point c in OFDM symbol 21, carry the corresponding CP type informations of the first subframe, time point c sections of time point a in OFDM symbol 21, for the CP of the OFDM symbol 21.So, when the second communication node removes demodulation OFDM symbols 21 using common CP, second communication node can receive time point d sections of the data of time point b in OFDM symbol 21, but because time point c sections of the data of time point b in OFDM symbol 21 and OFDM are accorded with Time point e sections of data of time point d in numbers 21 are identicals, so, the corresponding CP type informations of the first subframe at time point e sections of time point c in OFDM symbol 21 are have received equivalent to the second communication node.Because the second communication node will not receive the data in other OFDM symbols, so will not be disturbed between created symbol.And then, the second communication node can be based on the CP type informations, determine the CP types of the first subframe.

In specific implementation process, transmitted in last OFDM symbol for the particular time-slot that the CP type informations are placed in the first subframe, be specially：If the first communication node is actual to use common CP, CP type informations are positioned in OFDM symbol 17；If the first communication node is actual to use expansion CP, CP type informations are positioned in OFDM symbol 26.Now, no matter the CP types of last OFDM symbol are common CP or expand CP, second communication node can be based on common CP or expansion CP, and to this, last OFDM symbol is received, so as to obtain the CP type informations in last OFDM symbol.Specific reason is as follows：

As shown in Figure 3 B, referring specifically to Fig. 3 top half, if the actual transmission of the first communication node employ common CP, if time point i sections of time point h in OFDM symbol 17, for the corresponding CP type informations of the first subframe, time point h sections of time point g in OFDM symbol 17, for the CP in front of the CP type informations.As shown in Figure 3 B, referring specifically to Fig. 3 the latter half, if the actual transmission of the first communication node employs expansion CP, then time point i sections of time point h in OFDM symbol 26, for the corresponding CP type informations of the first subframe, time point h sections of time point f in OFDM symbol 26, for the CP in front of the CP type informations.

It can be seen that, during last OFDM symbol of the particular time-slot in the subframe of CP type informations first, no matter the actual transmission of the first communication node employs which type of CP, and the CP type informations are always positioned at time point i sections of time point h.So, no matter which kind of CP type the second communication node uses to last OFDM symbol（Refer specifically to：OFDM symbol 17 or OFDM symbol 26) received, the complete CP type informations at time point h sections of time point f in OFDM symbol 26 can be obtained.And, the data in other OFDM symbols will not be truncated to, intersymbol interference will not be caused.And then, the second communication node can be based on the CP type informations, determine the CP types of the first subframe.

So according to the embodiment of the present application, the second communication node can correctly demodulate CP classes after CP is removed Type information.And then, the second communication node can carry out other OFDM symbols demodulation in the first subframe according to obtained CP type informations.

Further, it is preferable that the particular time-slot is first time slot in the subframe of carrying CP type informations in first subframe.

In specific implementation process, if it is first time slot in the subframe of carrying CP type informations in the first subframe that the particular time-slot, which is selected, so the second communication node receive the first subframe first time slot in data when, the CP types of the first subframe can just be known, in the subframe for receiving carrying CP type informations during data in the second time slot, the CP types of the first subframe can be just directly based upon, data in second time slot are carried out to remove CP, and the data in the second time slot are obtained, so as to accelerate the reception to data in descending sub frame.It is on the contrary, if it is second time slot in the subframe of carrying CP type informations in the first subframe that the particular time-slot, which is selected, so in the subframe that the second communication node receives carrying CP type informations during data in the first time slot, the data in the time slot can not be just demodulated, CP is removed, data in first time slot can only be kept in.When receiving the second time slot data, after acquisition CP type informations, then data in the first time slot are demodulated.So, the reception to data in descending sub frame has just been slowed down.

In specific implementation process, the first communication node and the second communication node can determine a communication protocol, and it is specially first time slot or second time slot in the subframe for carry CP type informations to determine the particular time-slot.

Further, first subframe includes the subframe that ^ ^ carry the CP type informations.

In specific implementation process, the first subframe refer to the class subframe corresponding to CP type informations, can be a subframe or multiple subframes.Herein, the first subframe can be a subframe for carrying the CP type informations, i.e.,：When network side sends descending sub frame data, each subframe carries the CP type informations for being used to represent itself CP type.So, can anti-stop signal Lost lose the type for the CP for causing the second communication node can not know each subframe, and then each subframe can not be demodulated.

Further, the first subframe also includes carrying N number of subframe after the subframe of the CP type informations, wherein, N is positive integer.

In specific implementation process, the first subframe can refer to multiple subframes, wherein, CP type informations are carried in first subframe in the plurality of subframe, the CP type informations are used to represent first subframe And subsequent the type of the CP in N number of subframe.For example：The CP type informations of one subframe can indicate the CP types of 5 subframes next, it can then be indicated with 5 bit, each bit represents the CP types of a subframe, specifically such as, the CP type informations are that " 01101 " (" 0 " represents common CP, " 1 ", which is represented, expands CP), represent since present sub-frame, the CP for being respectively that 5 subframes below are used is respectively common CP, expand CP, expand CP, common CP, expand CP.So, the utilization ratio of CP type informations can be improved.

Further, step 104, it is specially：

First communication node sends the CP type informations by continuous M subcarrier or discontinuous M subcarrier in first subframe to the second communication node, wherein, M is positive integer.

In specific implementation process, continuous M subcarrier is can take up in the OFDM symbol for carrying CP type informations, discontinuous M subcarrier can also be occupied.The position of subcarrier can be that protocol definition is good or the first communication node notifies the second communication node with postponing.For example：As shown in Fig. 4 A, the OFDM symbol of carrying CP type informations can take continuous subcarrier 30;As shown in Fig. 4 B, the OFDM symbol of carrying CP type informations can also take discontinuous subcarrier 40.

Preferably, as shown in Fig. 4 B, the first communication node sends the CP type informations by discontinuous M subcarrier in first subframe to the second communication node, this ensure that the reliability of communication.Reason is as follows：

If continuous subcarrier 30 shared by CP type informations, if the channel of the frequency range where continuous subcarrier 30 there occurs deep fade, then the quality for the downlink data that the second communication node is received can be very poor.If discontinuous subcarrier 40 shared by CP type informations, the possibility that deep fade occurs simultaneously for the frequency range where these discontinuous subcarriers 40 is relatively low, so as to ensure that the reliability of communication.For example：As shown in Figure 4 B, CP type informations can take 12 subcarriers, and 12 subcarriers are divided into 3 groups, and what 3 groups were hooked is distributed in system bandwidth, every group 4 continuous subcarriers, and CP type informations are located on discontinuous subcarrier 40.Because simultaneously the possibility that deep fade occurs for the frequency range where 3 groups of subcarriers is relatively low, so as to ensure that the reliability of communication.

Further, step S103, including：

In specific implementation process, the first communication node is by the first subframe by the CP type informations with demodulating Reference signal sends jointly to the second communication node.

In specific implementation process, CP type informations can be transmitted together with demodulated reference signal.Second communication node is based on demodulated reference signal and carries out channel estimation, and then carries out the demodulation of CP type informations.So, the reception accuracy to OFDM symbol where CP type informations can be improved, and then accelerates the reception of data in the second communication node the first subframe corresponding to CP type informations.

For example：As shown in figure 5, in the OFDM symbol of carrying CP type informations, reserving 12 subcarriers, by 12 subcarriers, it is divided into 3 groups, every group is continuous 4 subcarriers, in every group of 4 subcarriers, respectively demodulated reference signal is transmitted with a subcarrier 50（Wherein, demodulated reference signal is used to carry out channel estimation, only completes channel estimation, UE could be demodulated to descending sub frame）.There is 1 subcarrier 50 to carry reference signal in every 4 subcarriers, and each subcarrier 50 with other 3 subcarriers apart from close, the channel that every group of four subcarriers are undergone is similar, so, the channel estimated from demodulated reference signal can be used onto other three subcarriers.In addition, other 3 subcarriers in addition to subcarrier 50 in every group of subcarrier are used for transmitting CP type informations, so, the demodulation speed to CP type informations can be improved, and then accelerate reception of second communication node to data in descending sub frame.

Further, this method also includes：

First communication node is using other resource transmissions other channel informations outside the resource for transmitting the CP type informations, i.e.,：Other channel informations are mapped in the resource outside the resource of the CP type informations.

In specific implementation process, in LTE system, there are many channels to need transmission, for example：PDCCH (PhysicalDownlink Control Channel, down physical layer control channel）Or EPDCCH (Enhanced PDCCH, enhanced down physical layer control channel）Or PDSCH (Physical Downlink Shared Channel, down physical layer shared channel）Or PMCH (Physical Multicast Channel, physical layer broadcast channel）, these channels can also take the subcarrier of different OFDM symbols.In the embodiment of the present application, introduce after CP type informations, these channels are when resource impact is carried out, it is necessary to avoid the resource taken using CP type informations.That is, having used resource in CP resource type information（Such as：Sub-carrier resources）Afterwards, other channels just no longer send data in these resources.Interfering for CP type informations and other channel informations can so be avoided. Further, this method also includes：

The type of CP in the second subframe for not corresponding to CP type informations in preset duration is notified the second communication node by the first communication node by high-level signaling.

In the embodiment of the present application, the descending sub frame in LET systems is divided into the first subframe and the class subframe of the second subframe two, the first subframe is subframe corresponding with the CP type informations, and the second subframe is subframe not corresponding with CP type informations.First subframe（Or second subframe）, can be a subframe or multiple subframes.For the first subframe, first communication node can be by by the CP type informations entrained by the first subframe, so that the second communication node determines to determine the type of CP in each first subframe based on the CP type informations, and then data in each first subframe are demodulated, received.For the second subframe, the first communication node can allow the second communication node to know the type of CP in the second subframe by high-level signaling or synchronizing signal, wherein, all subframes should have the CP of identical type in the second subframe.The preset duration is used to indicate the time domain scale where the second subframe, can be 40ms or 50ms etc., and the embodiment of the present application is not particularly limited.

For example：First communication node can notify the time domain scale where second the second subframe of communication node, such as using 40ms as the cycle, within first communication node can notify the second communication node per 40ms by high-level signaling, the 30-40 subframe is the second subframe, and the CP in the 1-30 subframe is common CP, the 31-40 subframe is the first subframe, and carries CP type informations.So, for the data in the 1-30 subframe, the second communication node can be received with common CP；For the data in the 31-40 subframe, the second communication node needs, by the CP type informations, to determine its CP type, then receive it.So, second communication node is knowing the type of CP in the second subframe by high-level signaling, and during scope where the second subframe, the second communication node rapidly can be demodulated to the second subframe, receive, so as to improve receiving velocity of second communication node to downlink data.

In more detail, the first communication node determines the second subframe according to following manner：

The first, the first communication node is according to broadcasting service（Multi-media Boradcast Multicast Service, MBMS) subframe of transmission determines.In LTE system, broadcasting service, due to its transmission characteristic, is to use to expand CP, and other business are then chosen whether using expansion CP according to cell channel condition.For example, certain cell determines broadcasting service using expansion CP, and other business use common CP.That The subframe for being possibly used for transmitting MBMS is just set as the first subframe, and determines to can be set as the second subframe or not for being used in transmission MBMS.In the second subframe, it is possible to specify received with common CP, and in the first subframe, because it is probably broadcasting service subframe, it is also possible to which common subframe by CP type informations, it is necessary to be obtained.

Second, the first communication node is determined according in this cell using different CP customer volume.For example, the user in this cell, most of to be adapted to be transmitted using common CP, and there is a small amount of user, it is necessary to just can guarantee that communication quality using CP is expanded.Most subframe can be defined as the second subframe by so the first communication node, and determine to be transmitted using common CP.And remaining subframe is the first subframe, it is necessary to which which kind of CP employed on earth by CP type informations instruction user.

Embodiment two：

Based on same inventive concept, a kind of method of determination CP types is present embodiments provided, applied in the second communication node.Second communication node can be user equipment (UE), such as：Mobile phone, tablet personal computer, PDA (Personal Digital Assistant, personal digital assistant）Or vehicle-mounted computer etc..As shown in fig. 6, the method for determination CP types includes：

Step S301:Second communication node receives the CP type informations from the first communication node；Wherein, the CP type informations are sent by the first communication node by the first subframe, and corresponding with the first subframe.

In specific implementation process, the CP type informations are used for the type for representing CP in the first subframe, such as：CP in first subframe is common CP or expansion CP.

Step S302:4 is blunt according to the CP type informations, determines the type of the CP in the first subframe.

Further, step S301, be specially：

Second communication node receives the CP type informations by first OFDM symbol and/or last OFDM symbol of particular time-slot in the first subframe.

Further, step S301, including：

If the CP type informations are placed in first OFDM symbol of particular time-slot in the first subframe, the second communication node uses common CP, demodulates first OFDM symbol, obtains CP type informations；

If CP type informations are placed in last OFDM symbol of particular time-slot in the first subframe, the second communication node is demodulated last OFDM symbol, is obtained CP classes using common CP or extension CP Type information.

Further, the first subframe includes the subframe for carrying the CP type informations.

In specific implementation process, the first subframe can be a subframe, and the subframe carries the CP type informations, and the CP type informations are used for the type for representing the CP of the subframe.

In specific implementation process, the first subframe can refer to multiple subframes, wherein, CP type informations are carried in first subframe in the plurality of subframe, the CP type informations are used to represent first subframe and subsequent the type of the CP in N number of subframe.

Further, this method also includes：

Second communication node receives the CP for the second subframe for not corresponding to CP type informations in the preset duration that first communication node is sent by high-level signaling type, so that the second communication node determines the CP of the second subframe type.

In specific implementation process, the embodiment of the present application includes two class subframes, i.e.,：First subframe and the second subframe.Wherein, the first subframe is corresponding with CP type informations, and the second communication node can know the type of CP in the first subframe by CP type informations；Second subframe is not with CP type informations, and the high-level signaling that the second communication node is issued by network side knows the type of the CP in the second subframe.For example：Using 40ms as the cycle, the first communication node notifies the second communication node to notify within per 40ms by high-level signaling, and the 30-40 subframe is the first subframe（Carry CP type informations）, and the 1-30 subframe is the 2nd CP (and CP types are common CP).So, for the 1-30 subframe, second communication node is confirmable to be received with common CP, for the 30-40 subframe, second communication node can determine its CP type based on CP type informations, and the type of the CP based on determination, the 30-40 subframe is received.So, second communication node is knowing the type of CP in the second subframe by high-level signaling, and during scope where the second subframe, the second communication node rapidly can be demodulated to the second subframe, receive, so as to improve receiving velocity of second communication node to downlink data.

Embodiment three：

Based on same inventive concept, a kind of first communication node is present embodiments provided, first communication section Point can be network side equipment, such as：Base station.As shown in fig. 6, first communication node includes：First determining unit 601, for determining cyclic prefix CP type information, wherein, the CP type informations represent the type of the CP in corresponding first subframe；Transmitting element 602, for receiving the CP type informations from the first determining unit 601, and the CP type informations are sent to the second communication node by the first subframe, so that the second communication node can determine the type of the CP in the first subframe according to the CP type informations.

Further, transmitting element 602 includes：

Module is placed in, for the CP type informations to be placed in first OFDM OFDM symbol of the particular time-slot in the first subframe and/or last OFDM symbol；

First sending module, for sending the CP type informations by first OFDM symbol and/or last OFDM symbol.

Further, the first communication node also includes：

Adding device, for before the CP type informations are sent to the second communication node by the first subframe, the type identical CP represented with the CP type informations to be added in the OFDM symbol for carrying the CP type informations.

Further, the particular time-slot is first time slot in the first subframe.

Further, transmitting element 602 also includes：

Second sending module, for sending the CP type informations to the second communication node by continuous M subcarrier or discontinuous M subcarrier in the first subframe, wherein, M is positive integer.

Further, transmitting element 602 also includes：

3rd sending module, for the CP type informations and demodulated reference signal to be sent jointly into the second communication node by the first subframe.

Further, the first communication node also includes：

Transmission unit, for using other resource transmissions other channel informations outside the resource for transmitting the CP type informations. Further, the first communication node also includes：

Notification unit, for by the type of the CP in the second subframe for not corresponding to CP type informations in preset duration, the second communication node being notified by high-level signaling or synchronizing signal, so that the second communication node determines the type of the CP in the second subframe.

Example IV：

Based on same inventive concept, a kind of second communication node is present embodiments provided, second communication node can be user equipment (UE), such as：Mobile phone, tablet personal computer, PDA (Personal Digital Assistant, personal digital assistant）Or vehicle-mounted computer etc..As shown in fig. 7, the second communication node includes：First receiving unit 701, for receiving the CP type informations from the first communication node；Wherein, the CP type informations are sent by the first communication node by the first subframe, and corresponding with the first subframe；Second determining unit 702, for obtaining the CP type informations from the first receiving unit 701, and according to the CP type informations, determines the type of the CP in the first subframe.

Further, the first receiving unit 701 includes：

First receiving module, for receiving the CP type informations by first OFDM symbol and/or last OFDM symbol of particular time-slot in the first subframe.

Further, the first receiving module is additionally operable to：

If the CP type informations are placed in first OFDM symbol of particular time-slot in the first subframe, using normal CP, first OFDM symbol are demodulated, the CP type informations are obtained；

If the CP type informations are placed in the first subframe in last OFDM symbol of particular time-slot, using normal CP or extension CP, last OFDM symbol are demodulated, the CP type informations are obtained.

Further, the second communication node also includes：

Second receiving unit, the type of the CP for receiving the second subframe for not corresponding to CP type informations in the preset duration that the first communication node is sent by high-level signaling or synchronizing signal, so that the second communication node determines the CP of the second subframe type. Embodiment five

Based on same inventive concept, a kind of first communication node is present embodiments provided, the first communication node can be network side equipment, such as：Base station.As shown in Fig. 9, first communication node includes：First processor 801, for determining cyclic prefix CP type information, wherein, the CP type informations represent the type of the CP in corresponding first subframe；The CP type informations are sent to the second communication node by the first subframe, so that the second communication node can determine the type of the CP in the first subframe according to the CP type informations.

In specific implementation process, the first communication node also includes：

First memory 802, is connected with first processor 801, for storing the CP type informations；First transceiver 803, is connected with first processor 801, under the control of first processor 801, the CP type informations to be sent to the second communication node by the first subframe.

Further, first processor 801 is additionally operable to：

The CP type informations are placed in first OFDM OFDM symbol of the particular time-slot in the first subframe and/or last OFDM symbol；The CP type informations are sent by first OFDM symbol and/or last OFDM symbol.

Further, first processor 801 is additionally operable to：

Before the CP type informations are sent to the second communication node by the first subframe, the type identical CP that addition is represented with the CP type informations in the OFDM symbol for carrying the CP type informations.

Further, the particular time-slot is first time slot in the first subframe.

Further, first processor 801 is additionally operable to：

The CP type informations are sent to the second communication node by continuous M subcarrier or discontinuous M subcarrier in the first subframe, wherein, M is positive integer.

Further, first processor 801 is additionally operable to：

The CP type informations and demodulated reference signal are sent jointly to by the second communication node by the first subframe. Further, first processor 801 is additionally operable to：

Using other resource transmissions other channel informations outside the resource for transmitting the CP type informations.

Further, first processor 801 is additionally operable to：

By the type of the CP in the second subframe for not corresponding to CP type informations in preset duration, the second communication node is notified by high-level signaling or synchronizing signal, so that the second communication node determines the type of the CP in the second subframe.

Embodiment six：

Based on same inventive concept, a kind of second communication node is present embodiments provided, the second communication node can be user equipment (UE), such as：Mobile phone, tablet personal computer, PDA (Personal Digital Assistant, personal digital assistant）Or vehicle-mounted computer etc..As shown in Figure 10, second communication node includes：Second processor 901, for receiving the CP type informations from the first communication node；Wherein, the CP type informations are sent by the first communication node by the first subframe, and corresponding with the first subframe；According to the CP type informations, the type of the CP in the first subframe is determined.

In specific implementation process, the second communication node also includes：

Second transceiver 903, is connected with second processor 901, under the control of second processor, receiving the CP type informations from the first communication node, and the CP type informations received are sent into second processor 901.

Second memory 902, is connected with second processor 901, for storing the CP type informations.Further, second processor 901 is additionally operable to：

The CP type informations are received by first OFDM symbol and/or last OFDM symbol of particular time-slot in the first subframe.

Further, second processor 901 is additionally operable to：

Further, the first subframe includes the subframe for carrying the CP type informations. Further, the first subframe also includes carrying N number of subframe after the subframe of the CP type informations, wherein, N is positive integer.

Further, second processor 901 is additionally operable to：

The CP for the second subframe for not corresponding to CP type informations in the preset duration that the first communication node is sent by high-level signaling or synchronizing signal type is received, so that the second communication node determines the CP of the second subframe type.

In the embodiment of the present application, because the first communication node to the second communication node before the first subframe is sent, first communication node determines the corresponding CP type informations of the first subframe first, wherein, the CP type informations represent the type of the CP in the first subframe, first communication node sends the CP type informations to the second communication node again, so that the second communication node can determine the type of the CP in the first subframe according to the CP type informations.Wherein, the first communication node can be network side equipment, and the second communication node can be user equipment (UE).So, efficiently solve in LTE system of the prior art in the case where there is common CP mixed with CP is expanded, there is user equipment (UE) can not know the technical problem of CP types of downlink transfer subframe in time, realize in LTE system in the case where there is common CP mixed with CP is expanded, UE can determine the technique effect of the CP of descending sub frame type in time based on CP type informations.

Although having been described for the preferred embodiment of the application, those skilled in the art once know basic creative concept, then other change and modification can be made to these embodiments.So, appended claims are intended to be construed to include preferred embodiment and fall into having altered and changing for the application scope.

Obviously, those skilled in the art can carry out various changes and modification to the application without departing from the spirit and scope of the present invention.So, if these modifications and variations of the application belong within the scope of the application claim and its equivalent technologies, then the application is also intended to comprising including these changes and modification.

Claims

Claim

1st, a kind of method for sending information, it is characterised in that methods described includes：

First communication node determines cyclic prefix CP type information, wherein, the CP type informations represent the type of the CP in corresponding first subframe；

First communication node sends the CP type informations by first subframe to the second communication node, so that second communication node can determine the type of the CP in first subframe according to the CP type informations.

2nd, the method as described in claim 1, it is characterised in that first communication node sends the CP type informations by first subframe to the second communication node, including：

The CP type informations are placed in first OFDM OFDM symbol of the particular time-slot in first subframe and/or last OFDM symbol by first communication node；

First communication node sends the CP type informations by first OFDM symbol and/or last OFDM symbol.

3rd, method as claimed in claim 2, it is characterised in that before first communication node sends the CP type informations by first subframe to the second communication node, methods described also includes：First communication node type identical CP that addition is represented with the CP type informations in the OFDM symbol for carrying the CP type informations.

4th, method as claimed in claim 2, it is characterised in that the particular time-slot is first time slot in first subframe.

5th, method as claimed in claim 2, it is characterised in that first subframe includes the subframe for carrying the CP type informations.

6th, method as claimed in claim 2, it is characterised in that first subframe also includes carrying N number of subframe after the subframe of the CP type informations, wherein, N is positive integer.

7th, the method as described in any claim of claim 1 ~ 6, it is characterised in that first communication node sends the CP type informations by first subframe to the second communication node, including：

First communication node passes through continuous M subcarrier or discontinuous M in first subframe Individual subcarrier sends the CP type informations to second communication node, wherein, M is positive integer.

8th, the method as described in any claim of claim 1 ~ 7, it is characterised in that first communication node sends the CP type informations by first subframe to the second communication node, including：

The CP type informations and demodulated reference signal are sent jointly to second communication node by first communication node by first subframe.

9th, the method as described in any claim of claim 1 ~ 8, it is characterised in that methods described also includes：First communication node is using other resource transmissions other channel informations outside the resource for transmitting the CP type informations.

10th, the method as described in claim 1 ~ 9 is any, it is characterised in that methods described also includes：First communication node is by the type of the CP in the second subframe for not corresponding to CP type informations in preset duration, second communication node is notified by high-level signaling or synchronizing signal, so that second communication node determines the type of the CP in second subframe.

11st, a kind of method of determination CP types, it is characterised in that methods described includes：

Second communication node receives the CP type informations from the first communication node；Wherein, the CP type informations are sent by first communication node by the first subframe, and corresponding with first subframe；Second communication node determines the type of the CP in first subframe according to the CP type informations.

12nd, method as claimed in claim 11, it is characterised in that second communication node receives the CP type informations from the first communication node, including：

Second communication node receives the CP type informations by first OFDM symbol of particular time-slot in first subframe and/or last OFDM symbol.

13rd, method as claimed in claim 12, it is characterised in that second communication node receives the CP type informations by first OFDM symbol of particular time-slot in first subframe and/or last OFDM symbol, including：

If the CP type informations are placed in first OFDM symbol of particular time-slot in first subframe, second communication node uses normal CP, demodulates first OFDM symbol, obtains the CP type informations； If the CP type informations are placed in first subframe in last OFDM symbol of particular time-slot, second communication node obtains the CP type informations using normal CP or extension CP, last described OFDM symbol of demodulation.

14th, the method as described in any claim of claim 11 ~ 13, it is characterised in that first subframe includes the subframe for carrying the CP type informations.

15th, method as claimed in claim 14, it is characterised in that first subframe also includes carrying N number of subframe after the subframe of the CP type informations, wherein, N is positive integer.

16th, method as claimed in claim 11, it is characterised in that methods described also includes：Second communication node receives the CP for the second subframe for not corresponding to CP type informations in the preset duration that first communication node is sent by high-level signaling or synchronizing signal type, so that second communication node determines the CP of second subframe type.

17th, a kind of first communication node, it is characterised in that including：

First determining unit, for determining cyclic prefix CP type information, wherein, the CP type informations represent the type of the CP in corresponding first subframe；

Transmitting element, for receiving the CP type informations from first determining unit, and the CP type informations are sent to the second communication node by first subframe, so that second communication node can determine the type of the CP in first subframe according to the CP type informations.

18th, the first communication node as claimed in claim 17, it is characterised in that the transmitting element includes：

Module is placed in, for the CP type informations to be placed in first OFDM OFDM symbol of the particular time-slot in first subframe and/or last OFDM symbol；

First sending module, for sending the CP type informations by first OFDM symbol and/or last OFDM symbol.

19th, the first communication node as claimed in claim 18, it is characterised in that first communication node also includes：

Adding device, for before the CP type informations are sent to the second communication node by first subframe, being added and the CP type informations table in the OFDM symbol for carrying the CP type informations The type identical CP shown.

20th, the first communication node as claimed in claim 18, it is characterised in that the particular time-slot is first time slot in first subframe.

21st, the first communication node as claimed in claim 18, it is characterised in that first subframe includes the subframe for carrying the CP type informations.

22nd, the first communication node as claimed in claim 18, it is characterised in that first subframe also includes carrying N number of subframe after the subframe of the CP type informations, wherein, N is positive integer.

23rd, the first communication node as described in any claim of claim 17 ~ 22, it is characterised in that the transmitting element also includes：

Second sending module, for sending the CP type informations to second communication node by continuous M subcarrier in first subframe or discontinuous M subcarrier, wherein, M is positive integer.

24th, the first communication node as described in any claim of claim 17 ~ 22, it is characterised in that the transmitting element also includes：

3rd sending module, for the CP type informations and demodulated reference signal to be sent jointly into second communication node by first subframe.

25th, the first communication node as described in any claim of claim 17 ~ 24, it is characterised in that first communication node also includes：

Transmission unit, for using other resource transmissions other channel informations outside the resource for transmitting the CP type informations.

26th, the first communication node as described in claim 1 ~ 9 is any, it is characterised in that first communication node also includes：

Notification unit, for by the type of the CP in the second subframe for not corresponding to CP type informations in preset duration, second communication node is notified by high-level signaling or synchronizing signal, so that second communication node determines the type of the CP in second subframe.

27th, a kind of second communication node, it is characterised in that including：

First receiving unit, for receiving the CP type informations from the first communication node；Wherein, the CP type informations are sent by first communication node by the first subframe, and corresponding with first subframe； Second determining unit, for obtaining the CP type informations from the receiving unit, and according to the CP type informations, determines the type of the CP in first subframe.

28th, the second communication node as claimed in claim 27, it is characterised in that first receiving unit includes：

First receiving module, the CP type informations are received for first OFDM symbol by particular time-slot in first subframe and/or last OFDM symbol.

29th, the second communication node as claimed in claim 28, it is characterised in that first receiving module is additionally operable to：

If the CP type informations are placed in first OFDM symbol of particular time-slot in first subframe, using normal CP, first OFDM symbol is demodulated, the CP type informations are obtained；If the CP type informations are placed in first subframe in last OFDM symbol of particular time-slot, using normal CP or extension CP, last described OFDM symbol of demodulation obtains the CP type informations.

30th, the second communication node as described in any claim of claim 27 ~ 29, it is characterised in that first subframe includes the subframe for carrying the CP type informations.

31st, the second communication node as claimed in claim 30, it is characterised in that first subframe also includes carrying N number of subframe after the subframe of the CP type informations, wherein, N is positive integer.

32nd, the second communication node as claimed in claim 27, it is characterised in that second communication node also includes：

Second receiving unit, for the type for the CP for receiving the second subframe for not corresponding to CP type informations in the preset duration that first communication node is sent by high-level signaling or synchronizing signal, so that second communication node determines the CP of second subframe type.

33rd, a kind of first communication node, it is characterised in that including：

First processor, for determining cyclic prefix CP type information, wherein, the CP type informations represent the type of the CP in corresponding first subframe；The CP type informations are sent to the second communication node by first subframe, so that second communication node can determine the type of the CP in first subframe according to the CP type informations. 34th, the first communication node as claimed in claim 33, it is characterised in that the first processor is additionally operable to：

The CP type informations are placed in first OFDM OFDM symbol of the particular time-slot in first subframe and/or last OFDM symbol；The CP type informations are sent by first OFDM symbol and/or last OFDM symbol.

35th, the first communication node as claimed in claim 34, it is characterised in that the first processor is additionally operable to：

It is described the CP type informations are sent to the second communication node by first subframe before, the type identical CP that addition is represented with the CP type informations in the OFDM symbol for carrying the CP type informations.

36th, the first communication node as claimed in claim 34, it is characterised in that the particular time-slot is first time slot in first subframe.

37th, the first communication node as claimed in claim 34, it is characterised in that first subframe includes the subframe for carrying the CP type informations.

38th, the first communication node as claimed in claim 34, it is characterised in that first subframe also includes carrying N number of subframe after the subframe of the CP type informations, wherein, N is positive integer.

39th, the first communication node as described in any claim of claim 33 ~ 38, it is characterised in that the first processor is additionally operable to：

The CP type informations are sent to second communication node by continuous M subcarrier in first subframe or discontinuous M subcarrier, wherein, M is positive integer.

40th, the first communication node as described in any claim of claim 33 ~ 39, it is characterised in that the first processor is additionally operable to：

The CP type informations and demodulated reference signal are sent jointly to by second communication node by first subframe.

41st, the first communication node as described in any claim of claim 33 ~ 40, it is characterised in that the first processor is additionally operable to：

Using other resource transmissions other channel informations outside the resource for transmitting the CP type informations. 42nd, the first communication node as described in claim 33 ~ 41 is any, it is characterised in that the first processor is additionally operable to：

By the type of the CP in the second subframe for not corresponding to CP type informations in preset duration, second communication node is notified by high-level signaling or synchronizing signal, so that second communication node determines the type of the CP in second subframe.

43rd, a kind of second communication node, it is characterised in that including：

Second processor, for receiving the CP type informations from the first communication node；Wherein, the CP type informations are sent by first communication node by the first subframe, and corresponding with first subframe；According to the CP type informations, the type of the CP in first subframe is determined.

44th, the second communication node as claimed in claim 43, it is characterised in that the second processor is additionally operable to：

The CP type informations are received by first OFDM symbol of particular time-slot in first subframe and/or last OFDM symbol.

45th, the second communication node as claimed in claim 44, it is characterised in that the second processor is additionally operable to：

If the CP type informations are placed in first OFDM symbol of particular time-slot in first subframe, using normal CP, first OFDM symbol is demodulated, the CP type informations are obtained；If the CP type informations are placed in first subframe in last OFDM symbol of particular time-slot, using normal CP or extension CP, last described OFDM symbol of demodulation obtains the CP type informations.

46th, the second communication node as described in any claim of claim 43 ~ 45, it is characterised in that first subframe includes the subframe for carrying the CP type informations.

47th, the second communication node as claimed in claim 46, it is characterised in that first subframe also includes carrying N number of subframe after the subframe of the CP type informations, wherein, N is positive integer.

48th, the second communication node as claimed in claim 43, it is characterised in that the second processor is additionally operable to：

Receive not right in the preset duration that first communication node is sent by high-level signaling or synchronizing signal The CP of the second subframe of CP type informations type is answered, so that second communication node determines the CP of second subframe type.